I recently had my first service visit with Cold Comfort, and I was very impressed. Jerry was the…read moretechnician who came out, and he was knowledgeable, thorough, and easy to talk to. It can be difficult to find honest and reliable HVAC companies, but this experience stood out. I had several questions prepared about my refrigerant, capacitor, and overall system, but I found that I did not even need to ask them because Jerry naturally addressed those topics during our conversation and explained everything clearly. He also completed a detailed inspection of my HVAC closet and offered a helpful recommendation for a better filter. The service was straightforward, with a flat fee and no upselling or pressure, which I really appreciated. Overall, it was a great experience, and I will definitely be using Cold Comfort again for my annual maintenance.

Our AC went out a little over a week ago, of course it happened toward the end of the week so it…read morewas Friday afternoon by the time we realized it wasn't something routine maintenance on our side would fix. Jary (who helped us when we first moved in) came out on Tuesday and said we had a leak somewhere since the closed-system unit was totally out of coolant. He came back Weds. to do the leak detection and found the leak, recommended a new coil. We had the new coil installed on Friday; this time it was Ricardo and team that did the work installing the coil. They did a great job and a couple hours later our house was back to normal temperature. Gabriel helped us with all the coordination and estimates and seeing if the part was still under warranty (it wasn't, but I didn't expect it would be honestly.) No one likes spending a bunch of money on repairs but I'm very confident that the recommendations Jary made were sound and correct. He did not attempt to upsell me at all, which is greatly appreciated. (The estimates Gabriel sent did include options for replacing the unit, but that wasn't necessary at this time and there was no pressure to do so.) I will continue to call them if we have issues in future with our HVAC system.

I had a problem with my HVAC not heating my house correctly in the morning. I set the temperature…read moreat 65 during the night and 72 during the day. This problem was recurring. I had another company come look at the problem 2.5 weeks ago. I called them in the morning and the showed up a couple hours later. After looking at my HVAC, they diagnose the problem as poor air flow due to a dirty air filter. There was a fine white powder on the filter which made it hard to see the dirt. The white powder is a result of using a ultra sonic humidifier with tap water. They suggest to change the filter more often (every 30 days) and buy a different brand filter with a MERV 8 or 10 rating.

Quick and professional. They came right away after I call. Highly recommended for serviceread more

Andrew was extremely knowledgeable and really spent time entering my questions and making great…read moresuggestions. I got the $79 diagnostic service and it was well worth it, letting me know that my air handler was fine but just had a bit of filter pieces in it, but my main AC condenser unit was on its last legs and I should be prepared. Great balance of knowledgeable but not pushy, I really felt he had my best interest at heart.

Very friendly, excellent service, and fixed the issue immediately after diagnosing the problem…read more They replaced a bad coil on the outdoor compressor contactor and rinsed the dirty outdoor unit coil. $415 for parts, labor. The diagnostic fee was $79 but they waive it if you're going to use them for repair. Would definitely patron them again!

Kary showed up at the time he stated, came in, found/ resolved my issue. The price was very…read morereasonable, and he gave me instructions should the issue arise again. Definitely will use his services again and will gladly give a referral.

From the owner: At DELTA HVAC & Commercial Refrigeration Services, a family-owned business in Howard County,…read moreMaryland, we pride ourselves on delivering top-notch service for all stages of life for your HVAC or Refrigeration system. Our promise is simple: "We take care of our customers—not advantage." This commitment drives everything we do. By keeping our business small, we're able to offer exceptional value without sacrificing quality. We focus on building strong relationships with families and small businesses that appreciate the personal touch, expert craftsmanship, and outstanding value that only a dedicated, independent company can provide. Reach out to us for all your HVAC and Refrigeration needs and experience the genuine customer service difference today

Sean was very thorough, inspected all my plumbing, and flushed the water heater. He was pleasant,…read moretidy, worked efficiently. He did a great job! Just as an addendum, the name change is not a good move, the old name was well-known in the community.

called one week ago because our ac wasn't working. made an appointment a for the next…read morewednesday.never showed up, never called, and never answered the phone! used the same number that we used to make the appointment and actually spoke with some when we made the appointment. yesterday no one answered the phone, did not have a message on so we couldn't even leave a message! don't call 410-623-3674!

The employees were quick and professional. They dos not make any attempts to ovwrsell and informed…read moreme of possible price increases during the project.

we had a regular maintaince done early in June. The experience was good and we had no problems…read more However, just 2 months after our AC began to leak water due to clogged drain pipe and overflown emergency drain pan. Besides the drain line not being accurately assessed, we can attribute this to other factors such as high heat, high humidity so leading to fast clogging 2 months after maintainance, though it has never clogged before. Since we had a good experience and wanted continuity of care from the same company, we reached out regarding the leak and hoping AG heating would come out and take a look. After a few text exchanges and asking them to come out, they stopped answering.

We lost air conditioning over the 4th of July weekend due to a power surge. I called All American…read moreand although we had to wait 24hrs, the emergency team was constantly in touch with us. Mike, the on-call technician, arrived at 10am, quickly diagnosed the problem, conducted the repair of the capacitor within 45 minutes. Upon the conclusion of the visit, the emergency charge and repair was fair & reasonable. Great job!

Great company. Terrific customer service. Working with Corey is great. She reminds us when our…read moremaintenance is due. Gets us set up quickly. We once had ants attacking the wiring on the outside AC unit. Their service man discovered it, told us how to get rid of the ants redid damaged wiring and we were cool again within a couple of hours

Vic came through and didn't try to upsell me. He was super busy and helped clear my condensate…read moredrain line with nitrogen (he carried a nitrogen tank capable of delivering high pressure to clear out debris). Also said my coils were extremely dirty and he didn't have the time that day to clean it but said I could look it up. Luckily, I was able to do that myself. Also, his price was fair and in line with other HVAC guys but I feel he is more honest. This was my second time using Vic and I'll use him a third time whenever an issue occurs.

Excellent Excellent Excellent!!! Vic came through with a short notice and was very knowledgeable on…read morethe issue. I highly recommend!

Carroll Mechanical was recommended to me by a friend and after my conversation with Thaice, the…read morecustomer service rep, and Derrick the technician who worked on the HVAC unit, I can see why. Both were so helpful and knowledgeable and answered all my questions (and I had a few). I wouldn't hesitate to call on Carroll Mechanical again and I definitely would recommend them to my friends as well. The service is 5-stars, quick appointments and pricing is fair.

Josh came out to fix our HVAC and was very courteous and friendly. The company, Carroll Mechanical,…read more scheduled the appointment for the day after I called, which was impressive. Josh quickly replaced the igniter, and it came with a one-year warranty. Saved me 12k to replace it! definitely worth it. Highly, highly recommend !

I scheduled an annual service with Greenfox. They came out on 5/6/2026 and performed the service…read morefor what I believe was $99. They said everything was good to go - no issues. Two weeks later, on 5/18, the air conditioning stopped working. They market themselves as 24-hour, so I called 5 times that evening. They have a system for screening their calls. I communicated several times that this was an urgent concern, as I have 5 pets who would be intolerant of the 100-degree heat forecast for the following day. Even after dark, my house was 85 degrees. After those calls, I received no calls back. The next morning, on 5/19, I scheduled a morning appointment with Greenfox and then chatted with them via their chat system. The person on the chat assured me that this was a concern. They reported that they marked my appointment as urgent and would register a complaint with the company on my behalf. They assured me that the tech would leave and arrive at my house by 8am. 8am came and went with no call or contact from Greenfox. I logged on to the chat again and spoke with another agent and recounted everything that had happened previously. They said they could do nothing but make appointments on the chat. I said that I did that morning and was told the appointment would be around 8. They said I would have to call the office. I told them that I already had 5 times, and I received no return call. The chat said there was nothing they could do. I then spent time I could have been working calling other companies to try to get service, as the house was getting close to 80 degrees at 9:30 AM. A tech from Greenfox eventually arrived at around 11:15. The company never called me back at all; they didn't let me know he was coming. I received an automated text that the tech was coming 15 minutes after he arrived. He found the issue, which should have been discovered two weeks earlier at the servicing appointment. The tech then left, saying, "I'll send you the invoice." No discussion. The tech then charged us $245 for a problem that should have been caught during the initial service we already paid for. Getting an annual service from this company is useless. It appears they didn't thoroughly review for potential issues, which has left my AC not working on the hottest days of the year so far. There was no consideration on the second bill for the poor work of the technician who came out to service. They don't answer phone calls. They don't call anyone back. They don't let you know a tech is coming. Their chat responses are, at minimum, disingenuous and, at worst, outright lies. And then they still charge you double, even though it was their error. There are far better and more reliable companies in the area, with whom I will be contracting going forward.

Simply put - overall excellent timely service. We had a new unit installed replacing old one in…read moreJune 2026. Respectful, congenial and helpful team, including the management. Easy to work with, price was right. Shahid Aziz