Today was the 2nd time we've used this company and both times have been great! Last night, our A/C was not cooling our 3,000 sq ft house and with a toddler in the mix, we needed to get this fixed fast! With that being said, I called the next morning and they were able to be accomodating to my request of coming over to fix it. Less than an hour later, they called to mentioned they'll be over that day! Lisandro came over and figured out what the issue was a knocked it out in less than hour. Ironically enough, I had an A/C tune up scheduled for the follow day. So he was able to take care of that as well. Needless to say, with the temps in the 90's this week, we back to the A/C running on all cylinders. Again - I highly recommend this business! read more

Paid for them to come out for a routine yearly maintenance appointment and our HVAC machine completely broke down 3 weeks later. We found out after we hired a second independent HVAC company to repair the broken HVAC that Guardian didn't actually maintain anything during the routine maintenance appointment. They didn't change my air filter (or tell me that it needed to be replaced), didn't clean the coils in the back which were blocking the air flow. Guardian also tried to bill us extra for replacement parts that didn't need to be replaced. read more

If I could give 0 stars, I would. I have been a maintenance plan member since January 2022. I called in early July to have my AC units checked, however, I was told they were too busy at that time to do the check-up, which confused me since I thought that was the point of being a maintenance plan member. They scheduled an appointment about 3 weeks out, but never showed up. I then tried to schedule another visit, however, they never got back to me. On top of all of this, I canceled my service on July 27, 2026, and they still charged me the subsequent two months. I have called their offices almost half a dozen times now and no one calls me back. Very unprofessional and shady businesses practices. read more

Guardian Heating & Cooling Service - Email to cancel monthly service - Heating & Air Conditioning/HVAC Near Me - Chicago, Illinois

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This is not a good company. We had them install a wall furnace for us in March. First the installers lied to our faces when we asked about the installation. We know they lied because the manufacturer's manual said the opposite of what they did. Also, the installers couldn't figure out how to close our gate, so rather than telling us, they broke it. The wall furnace they installed was very loud when it ran (think commercial vacuum cleaner on high speed) and it only heated a small part of the area. We had Guardian come out to address our concerns. They said the install could be fixed but it would cost more to move the gas pipe. We told them that the installers should have offered us that option. They acknowledged that the heater was loud and didn't heat well, but tried to insist that we'd get used to it. We wanted the heater gone and a refund. After the visit, in a follow up email, they offered to install another solution or they could remove their handiwork and give us a partial refund. We opted for removal/refund. After the lying and gaslighting, we really didn't trust these people to do anything else to our house. We feared they'd find/create issues just to keep billing into infinity. I think they expected us to opt for their other, "no additional cost", solution and wouldn't have put the refund offer in writing if they'd known we weren't stupid enough to let them touch our house again. It took two weeks for them to remove the heater. After six weeks of us asking for the refund and getting, "It's in the mail" type responses. we diputed the charge with the credit card company. We got back a little less than half of what we paid. I can't write everything that happened here, but this company made me distrustful of all HVAC people, and maybe, seeing how these people are, that is a good thing. read more

Was totally scammed by this company. Said they were establishing themselves in Milwaukee from Chicago. Took $750. Tore my plumbing apart. Couldn't figure out how to turn the water off. Flooded my house. Broke my toilet. Then ghosted me. Do not use this company. He was very nice and I took him for his word. read more

First off, these guys deserve five stars for their customer service; especially their Installer, Martin! He is the man! We wanted Carrier and Guardian is one of three dealers featured by Carrier. We had all three featured dealers quote us and Guardian's price blew the other two out of the water. We deducted a star just because there was a miscommunication between the sales team and the install which meant the installers had to come out a second time to rectify things but thankfully we got Martin again. Definitely pleased with their work and expect they'll be in the running when we replace the other hvac zone in our house. read more

"You're changing your furnace filter regularly, right?" Yep "You're changing your humidifier filter annually, right?" Mmm, what's that now? Maybe my husband should also be here. I couldn't recall the last time we had our furnace cleaned and inspected, we were long overdue. I picked Guardian due to their high reviews and good pricing. Our rep was early for the inspection, which was unexpected, but great. Our rep explained the whole humidifier panel issue, pricing for him to do it and replacement parts if we opted to DIY. He also reviewed the results of our inspection. We appreciated his candor and him not aggressively trying to upsell us. PSA: Have a humidifier on your furnace? Change that filter folks, it's not hard to do on your own, not very expensive. read more

This place is a joke. Jasper came out for an AC replacement estimate, turned off the power switch on my furnace, and then tried convincing me the entire furnace was broken and the circuit board fuse had been blown. He told me I had to have the entire circuit board replaced and was quoting me over $1000 for it to be fixed. I ultimately chose a different company to replace my AC and had them also inspect my furnace for possible issues. The AC tech told me the power switch had been shut off and there were absolutely no issues with my furnace, despite what Jasper had said. He turned it right back on again and it worked fine, despite Jasper trying to scare me into thinking it needed to be replaced. Watch out and think twice before doing business with this company. read more

The technician was professional, but the pricing structure is extremely unreasonable. I needed a capacitor replaced for my AC - a part online is $13. The company quote was $580 for the repair, with nearly $400 of that attributed to the part itself. Given that the average hourly rate for HVAC technician is $150-200, the markup on the price is difficult to justify. Their pricing model feels excessive and not transparent. read more

Incredible prompt service, put a whole AC system in, no problems or surprises. Highly recommend.

I wish to express my dissatisfaction with the recent experience I have had with your company's customer service regarding my maintenance agreement payment. A few weeks ago, I received a text message notifying me that my payment for the maintenance agreement didn't go through. The message instructed me to contact the office if this was an error and /or call to rectify the payment information. Since then, I have made three separate calls to your office, most recently yesterday afternoon, and have spoken with Donna each time. I explained the situation regarding the text message I received and expressed my confusion as to why the payment didn't go through as my card information and security code has not changed. On each occassion, Donna verified my address and card number multiple times during our conversations, yet the issue remains unresolved. I must emphasize my disappointment in the level of service provided by Donna. Her handling of the situation reflects poorly on your company's reputation for superior customer service. I rate her service as one star and would give her a ZERO rating if it was available due to her unwillingness to resolve the matter, which I'm sure involves nothing more than a click of a button. I believe that there was no error with my payment going through, but feel that because I was unable to have maintenace at my home this winter, due to a serious illness in the family, that Donna somehow decided I should no longer have access to the Shield of Protection Program. How stellar of her. I didn't know when I called over I was speaking to God. It is unfortunate that I have to bring attention to this issue, especially considering the excellent service I have always received from your technicians. I particularly want to commend Peter for going above and beyond in the past, which is why I have continued to rely on your company for my HVAC needs. Does the trust and satisfaction of customers not mean anything anymore? Shame on Donna. read more

Guardian Heating & Cooling Service - Text Received Regarding Issue with Payment - Heating & Air Conditioning/HVAC Near Me - Chicago, Illinois

After Q4 of 2024 this company is SCAM. They will lie to you about unnecessary repairs & even a need to purchase new AC or HVAC from them. They did this to us several times (multiple properties) and our neightboors. Hopefully a class action lawsuit is coming their way. read more

The customer service rep was very patient and helped me sort through misinformation (from a different hvac company) to correctly identify the brand and model number of my HOA hvac unit. For years, the unit has leaked water. Anthony (the technician) spent 1.5 hours to figure out what was going on. While I have no idea why/when the refrigerant and the drain lines were cut, at least I now know why we always have water. Anthony had recommendations about what we could do with the unit but wasn't pushy, and he promised to follow up with a quote and to see what could be done about the severed drain line. The notes he wrote on the invoice were very clear and easy to follow read more

Complete shady guys, don't waste your time and money. Told us that the service fee was $89, then suddenly it's $169. Technician did the work to "fix" a gas leak and 10 minutes after he left gas smell is back, luckily he came back and fixed it. Next morning, gas smell is back, they charge us again $149 service fee to tell us a different part is the issue that will cost $1200. The whole time people's gas has identified the issue and the technician had that work order in hand but they failed to ever check that. So we were charged twice and completely ripped off when trying to address a health and safety issue for our children. read more

These guys came out on a Friday and took a look at our boiler and told us it was leaking carbon monoxide and needed replaced. By Monday they were on site taking care of the boiler replacement. They also relocated a radiator and installed a new one and did a great (and quick!) job. Not even related to their job but worth mentioning - They helped me out big time when a gas range was delivered by Home Depot, who dropped it off on our busy sidewalk, refusing to drop it off on the porch. The Guardian guys carried the large range inside for me. I'm so thankful. read more

Guardian Heating & Cooling Service - Heating & Air Conditioning/HVAC Near Me - Chicago, Illinois

Guardian came to my house last year to top off the coolant and fix a leak. They charged me $700 for two pounds of coolant. However, one year later I found no cooling in the house and called another vendor who said i was down 8 pounds in coolant - in other words it was empty- because both valves were not tightened properly and the coolant was leaking from the valves. Did Guardian not tighten the valves completely when they left? I asked Guardian what they charge for R22 and they said $375 per pound. My new vendor only charged me $75 per pound. I understand you need to make money but this is highway robbery. Stay Cool. read more

Guardian replaced my air-conditioner condenser with what was supposed to be a new condenser. But what they installed was an air-conditioner condenser that was 7 years old; that is, one that was sitting somewhere for 7 years. I discovered this because I called Guardian after the yearly cleaning this year and asked why they didn't use the spray to clean it. They told me that my condenser is too old to be cleaned that way and could be damaged if they used it. I questioned the age of the condenser, and the woman on the phone gave me the year the condenser was manufactured, which my memory told me was 7 years before the installation. So I checked the date of installation on the invoice, and sure enough, the condenser was 7 years old at installation. Guardian sold me an air-conditioner condenser that was supposed to be new and up-to date but was in truth 7 years old. read more

The maintenance agreement sell is a turnoff. Wanted to charge nearly $700 to replace the igniter. Or $500 if I bought the maintenance agreement. I did it myself! FYI they charge $129 fee to come out which they neglected to mention when I made the appointment. read more

I lived in Chicago for 14 years and purchased a condo in 2016, with a dated AC. I knew I was going to have to replace it eventually and since I had some expensive repairs due, I purchased a new AC this year. After obtaining quotes from a few reputable Chicago HVAC companies, Guardian is the only one that had the appropriate model in stock that fit my condo specs. After realizing the existing furnace was too large for my unit, I also upgraded to a new furnace to function with my new AC. It became a large purchase quickly. The furnace was having some intermittent issues the previous winter. As a first-time homeowner, I had Four Seasons doing annual maintenance on the existing HVAC and didn't have any issues with them. Alen M. did a great job during the sales process. As an IT engineer, I did my research but relied on him to sell me the right model. Other vendors quoted me the wrong size or tried to match the existing model, which was technically too big for the unit. I was happy he did that off the bat. Alen also described some industry trends and SEER ratings I was interested in. He quoted a good/better/best scenario and I chose a Carrier model with 0% financing. They had the models in stock, during the supply chain restraints of the pandemic, which was my only option since other vendors had ACs on backorder. Since I'm managing a rental tenant, it was important they did a seamless job. They offered a real-time status with installation pictures, which was great. There was one issue, the installer gouged the wall corner during the furnace install, in a tight space. Guardian dry walled it for free and Jasper issued a check for the handyman paint job. My tenant was a bit inconvenienced by the situation since it took several weeks to get the paint match via the handyman, but in the end it worked out. read more

Guardian resolved the dispute with the check and provided an explanation and told me it happened to a few other people and they have fixed the problem. As far as the system and installation - the installers were top notch with a very clean installation and so far no issues with it. read more

We have had a policy with Guardian for years, but the new owners are CRIMINALS. On a routine policy visit, a Guardian representative told me that we need to replace our furnace and to call him and NOT the office for quote. Later when it got cold, we discovered (from another HVAC service) that the Guardian rep shut off our furnace. BEWARE OF GUARDIAN. read more

i had guardian heating and cooling out to my house today 06/10/25. the technician was darwin. he was very patient and kind. he took the time to answer my questions and i felt very comfortable with his expertise and knowledge. i have noticed a significant change in the new ownership and the changes they are making. they are trying to make a difference in how their business is handled. they are certified where most hvac companies are not and in the state of illinois it is not required which does not make me feel safe knowing there are many companies running around the city doing installations and they have no formal license or certifications. i would highly recommend guardian heating and cooling, and if you do have an issue, they are willing to make corrections if they are aware of the situation. read more

Had 5 firms come see my furnace that I'd been told needed to be replaced. Only Guardian asked why the furnace failed and then investigated. Jasper discovered rust created the crack in the heat exchanger and then asked where the water came from, and checked the AC coil, which also had rust and had leaked into the furnace. So if I'd gone with any of the firms that were only going to have replaced my furnace, the leaking AC coil would have ruined my new furnace. I went with Guardian and replaced my AC too because I want service technicians who think though problems carefully to find the best solution. They were not the cheapest but I think they are the best. read more

Guardian did the service in my old apartment, so when I moved to a new house, I was glad to bring Guardian with me. The prior owners did not do regular service and it showed. Peter and Gabriel came and got everything serviced like new. They repaired a leaking dielectric valve on our boiler and found enough issues with one of the furnaces to need replacement. Guardian came back the next day and was able to install a new one perfectly. I believe we are maximizing our investment by using Guardian because their technicians do good work. read more

I've been a Guardian member for a year, and couldn't be happier. The service has been fine (nicest techs!) but, last week, I found out that I'd have to replace my A/C. Jasper came out to go over what I'd need and, with no sales push at all, I realized I'd be wise to go ahead and replace the entire HVAC. This morning, Rory (lead) and Akim arrived to install my new system. They're a real dream team. Though I was working from home, they did not disturb me. Hard as they worked, they never seemed to break a sweat, and always had a ready smile. The cherry on top? They left my home at least as clean - probably cleaner! - than they found it. If you're looking for a quality, fairly-priced HVAC contractor - call Guardian! read more

I have never had a serviceman come to my home and behave so unprofessionally. After spending less than 10 minutes in my home, this serviceman made disparaging remarks and exited my home. I was on another floor of the house looking for the remote control and didn't know that he had left. The telephone rang --he was on the line stating that "I won't touch it; too many hands have been on it!--I replied" Okay, I'll come and see you out." He revealed that he'd already left. And he had indeed left & left all the doors to my house wide open for any criminal to enter. I can understand if you don't want to tackle a job, but endangering someone's life is another matter altogether. I would not recommend this company to anyone, especially women & senior citizens. read more

My furnace went out in the middle the night. Saturday morning I called Guardian and they had someone out in about 2 hours. Joel was great and he diagnosed the problem. Burnt out fan motor, which explains the burnt smell. Not a cheap to fix but also not a job I can do. He drove out and picked up the motor and had my furnace up and running shortly after. Was also encouraged to sign up for their monthly plan which gave me 30% off on the motor. Saved me a ton of money and the monthly subscription is pretty cool. $10 a month and comes with a cleaning once a year which is normally about $100. Not to mention all the money I just saved on this fix. Will be adding a subscription for my AC unit in the spring. Overall I'd say it was a good experience. I'm all about monthly subscriptions that save me money like that. Also they were super fast and responsive. Will be using guardian for all my HVAC needs. read more

We did not have the best experience with this company. The technician showed up early and was very friendly, however, there were quite a few issues we noticed. 1. They left garbage from their visit in our home 2. They removed the air filter from the furnace and never replaced it. The unit was running without an air filter for hours 3. A pipe was leaking, which they replaced. However, continued to leak the next day. 4. The dripping from our humidifier was indicated as a "leak" needing an almost $700 replacement part - a Rheem certified technician later confirmed this dripping is normal condensation flowing from the humidifier. There was no need to spend money on a replacement part. 5. The technician quoted $129 to service the first unit, and $99 for each additional unit. They later back-tracked, and tried to charge us $129 for each unit, citing the need for additional time 6. The "additional time" likely came from the phone calls the technician was taking in our backyard while on our service call 7. They were annoyingly persistent about getting us on their "Maintenance Plan". They brought the service plan up repeatedly even after I told him we were not interested. This was the first red flag. 8. One of the heating units serviced showed a small leak. They pointed this leak out and told us the unit needed replacement. The Rheem certified technician pointed out the leak was coming from a small pipe that had disconnected, that was in plain site at the front of the unit. It took two minutes to fix this "leak", and it was painfully obvious where the leak originated. The Guardian technician could have simply re-connected the pipe, but chose to close the unit back up and let it continue to leak in our property. And, of course, we were scheduled for a sales visit the very next day for multiple replacements..... Toward the end of the visit, we simply wanted this person off of our property. And Guardian will never be welcomed in our home again. We called another company the same day to come out and check this person's work, and confirmed our suspicions that Guardian is not to be trusted. You've been warned. read more

Huge waste of time and money. We had Guardian come out to perform a routine cleaning and maintenance of our AC as the weather was warming up. I wasn't paying much attention and let the technician do his thing. He was telling me everything looks good and wanted to run the AC for a while to take some measurements. I turned on the AC and it ran for about 15 minutes before shutting off and making a weird noise. The guy literally said "uh oh I hope I didn't break it." He charged me $150 for his services and told me the AC is broken beyond repair and I shouldn't even consider trying to fix it. This was very unexpected since the unit is 7 years old and worked just fine last summer. I googled around and found a bunch of sites saying you shouldn't run the AC when it's cold since that can damage the unit - it was 40 degrees that day. Don't know if that's what broke it, but I'm guessing it was part of the problem. I asked Guardian to send someone else and take a look to make sure the thing was really beyond repair since it seemed strange that it would go from working last summer to completely messed up. They sent a "comfort technician" who proceeded to disassemble my entire furnace and tell me all about how the previous installers didn't know what they were doing and I needed a new furnace. What about the AC? Then he goes in to detail about how my hot water heater was installed improperly and that that needs to be replaced too. I listened to all this hoping he'd tell me how to get the AC back in order but no such luck. He wanted a senior tech to come out and take a look. That night I woke up because the house was freezing. I saw that my thermostat wasn't receiving power and had a mild heart attack before realizing the "comfort technician" forgot to flip the breaker to the furnace back on before leaving. Pretty sloppy of him. The senior tech came out and wasted another hour and a half of my time telling me that I need a new AC and furnace - the units are too large for my space, and the ducts are all wrong, and look at all this moisture. I told him I just wanted to get the AC working in time for the summer. He said he couldn't test it because it was too cold outside... Why didn't first tech know that? He would come back on a warmer day. He came back and proceeded to disassemble the AC condenser. When he put it back together and turned it on the fan started making a loud grinding noise. I told him that was new and he made a big show of telling me how Guardian always takes responsibility for their mistakes and they would fix the fan since they broke it. However the fan was not worth fixing since the whole thing was doomed anyway so instead he'd give me a great deal on a new unit. I said OK and got a quote for "50% off" an open box condenser. By this point I was pretty sick of dealing with these clowns but it was clear they weren't going to fix the AC so I either needed someone else to fix it or just get a new one. I called ABT to get a quote and their full price quote for a comparable unit was $400 less than the Guardian discount. They even threw in the lift needed to get the unit to the roof for free (another $350). I ended up getting a new AC from ABT. Guardian was kind enough to refund the $150 for their maintenance services. read more

Called due to my a/c not turning on at times. Waited 4 days and service reps charged $89 to look at. Well the auto-dealership tactics where in high gear. Would not address my current problem of no a/c. I was told would not repair my system but needed to replace entire heat chp, coil, condenser, vents etc. Cost between $16,000 to $26,000. Plenty of good reviews so I was very disappointed and disheartened. I believe a good choice for new home install. But discouraged that no real repair ideas were presented. read more

Have used Guardian for five years and I will say they do get it right in the end. But their modus operandi is to send the least experienced tech out for whatever job you have and hope (pray) he can repair or install what's needed. After a full day of frustration and failure with leaks and fumes and dirt, that person leaves with the situation no better than it was before. Then the next day they send somebody out who actually knows what he's doing and it's fixed in an hour or two. If this just happened once, I'd understand; you do have to give apprentices a chance to learn. But it's happened virtually **every time** we've needed them. Still, they are friendly and less expensive than BestCo, their biggest competitor in NW Chicago, especially for boiler/radiator heating systems. read more

Sergio with Guardian was a knowledgeable and experienced technician. He clearly explained the problem and what was needed to remedy it. He also informed of future problem and fix. Gave timeframe regarding warranty coverage saving money on that replacement. I highly recommend Guardian, Sergio and their entire staff particularly their call center representatives. read more

Arrived on time. Polite. Friendly. I assume he did a good job. My heat and AC work.j

I have a Rheem on-demand hot water heater that stopped working and was flashing CODE 11. I contacted Guardian and they were able to schedule a technician pretty quickly. When he arrived, I showed him what the problem was and he said that the on-demand water heater problems were typically due to a lack of maintenance and that he would perform that and hope that solved the problem. He also said, "Ah, we charge $200/hour." Well, he was already there and we needed hot water so I told him to go ahead. An hour later, he said the unit looked good (it is less than 2 years old) and that the problem was actually the ignitor, which he needed to order, and the company would contact me soon with a quote. So I paid $318 for the cleaning/maintenance, which I really didn't need. The next day they sent me a quote to install the ignitor--$227 for labor + $192 for shipping and handling to get the part (which was under warranty and would not cost a thing). Both of these numbers seemed to be very high so I contacted Rheem directly and was able to order the ignitor for $19. Then I decided to do some research on replacing the ignitor (searching for: CODE 11 for Rheem hot water heaters) and I found a video showing how to replace it--and it was about as easy as replacing batteries in a flashlight--it took me 5 minutes from start to finish (I can't believe they were going to charge e $227 for this!). Guardian may be a good company for some jobs, they were quick to respond and very professional, but I don't see why the technician wasn't able to diagnose the problem immediately (and just charge me the $89 trip fee--on the video I found, it said if you hear a click and then get that error code, it means the ignitor is the issue, so it shouldn't have taken much detective work from a professional to figure this out). So, in the end, I guess we got $318 maintenance we didn't need but now my wife thinks I'm a hero because I saved us $400 by doing a little research and installing the defective piece myself. Ah, live and learn :) read more

Once again reliable prompt professional service from the experts at Guardian. Thankfully on a 100 degree day Sergio was able to diagnose and repair my AC quickly and efficiently. I'm very happy to have found this five star company, read more

They were able to repair our AC in about 2 1/2 hours but the price was shockingly high. Not only was it way more than I expected, but the $89 service fee was still charged. In my past experiences with other companies, a service fee is absorbed into the labor cost if you proceed with repairs after diagnosis. I would not use this company again, there are others that charge less for repairs. read more

This is not a review of their repair service, but their $9.95 per month preferred customer program. By agreeing to pay that monthly fee, a customer is guaranteed same day service. The day after Thanksgiving, ( a Friday) I called on behalf of a tenant with no heat. The office was closed for the holiday, but a technician called me back. He said they were fully booked due to the cold weather. I explained that I was enrolled in the preferred customer program, he confirmed that fact, but couldn't even offer me service the following day. He said I should call the office on the Monday for service. This would have left my tenant with no heat for three days. I ended up calling another company and paying a premium for emergency service. When I called Guardian to complain, I was told that a Manager would call me back..they failed to do so. Guardian does good work..just don't waste your money on the $9.95 monthly "preferred customer" program. read more

My heat went out on the first freeze of the season. Guardian came to the rescue. Identified the problem and had a replacement part in stock. My heat was back on the same day. read more

I was impressed. The technician, Tyler, that came out and serviced our two A/C units, was awesome! He was extremely knowledgeable, professional and efficient. He taught me a few new things about our Nest thermostat and about cooling in general. He was Very well spoken and intelligent. In fact, My wife and I have decided to get on a service contract, with guardian, because of him. I highly recommend these guys, they gave us quality service from the initial phone call all the way through to the billing. Excellent, excellent, excellent, your search should stop here;) read more

Inexperience can be very costly. Get a second opinion: I woke up to no heat. Called Guardian who is around the corner from my residence. They sent out a technician (20 years old or so) who tinkered around the unit without any answers eventually snapping off the high limit switch with his pliers and blaming it on corrosion. He also blew the fuse which might have blackened the circuit board. He left without returning our heat after giving us an option to open the store to obtain parts for hundreds of dollars premium, which I declined. The following day, I got a quote for 4,000 worth of repairs. Decided to call another contractor who in turn came out and properly assessed the situation. It turns out I had a short in my thermostat wires which needed to be replaced. Only now, the high limit switch which was broken needed to be replaced. I opted to buy a new furnace rather than risk 50% the cost of a replacement, on a repair attempt. Only after the new furnace was installed did it dawn on me what happened. Whatever you do, make sure you get a second opinion and beware of any new, green, inexperienced or incompetent people they send out. It could end up costing you thousands of dollars. PS: I do not want to paint the technician in an undeserved light. He was a very nice guy. We all don't know anything until we learn. To elaborate on the situation, the technician, who offered to open a store for $200 in additional to the $150 switch that he broke, was not confident that that would solve the issue. He also mentioned the gas valve and circuit board being bad. The solution? Two more $200 store openings for a total of $600, excluding the cost of the parts and labor. He was not confident that replacing even all three items would get the furnace working. For $600, I opted to wait out the cold weekend until the stores opened on Monday. Also, in addition to the switch, the technician was bypassing multiple items in the furnace turning it on and off repeatedly and in short succession resulting in a blown fuse, which he promptly replaced. Come Monday, I get the quote for $4,000 which included a 579.00 cost to replace the switch, that the Guardian technician broke. $600 is far in excess of the $350 I was quoted with the store opening charge which made it apparent that I either had someone that was not experienced enough to solve the issue or I was about to get scammed. I called another vendor who came out, tested all wires including the circuit board (as I mentioned it could be bad per Darwin's recommendation) and found that there was a short coming from the thermostat to the furnace. He wrote up a repair quote of $1,500 which included replacing the bad wires as well as the broken switch that Guardian broke, in front of me. Given that I did not have the cash to spend on a repair of a furnace I was now paranoid of, I opted for the replacement, on monthly payments at 0% financing from Deljo. I am sure that Guardian has competent technicians I just happened to be sent a newbie. And I know he is new because he is 20 years old. I wish that my luck had been different and I had either called Deljo or was dispatched someone with more experience who could have properly tested the system and found that only the faulty wire needed to be replaced. That would have saved me thousands but as fate would have it, I ended up with an expensive lesson. I have not come back to Guardian demanding anything but recognition in the mistake or missed assessment that cost me dearly. Instead, I got a defensive response. In conclusion, I am recommending that Darwin and all reading residents out there make sure to check the thermostat connection as well if the issue is not immediately obvious read more