I'm leaving a review based on my prior experiences with KCS (have used them since we purchased our home in 2020). We got their base maintenance plan with 2 inspection services each year, and used that for about 3 years (no real issues to fix.) During one inspection in 2024, the tech realized that our furnace water pan had filled (but not so high it shut off yet) and he helped identify the problem and luckily was able to fix it the same day (no parts/ charge.) He suggested in a non-pushy way that it really may benefit us to up our plan to the higher one (almost double the cost/yr, so a little scary) because we're probably entering the zone where larger repairs may start for our furnace and the plan covered most of the types of parts that would be in a significant repair. He seemed knowledgeable and trustworthy, so we decided to at least do it for a year. We were very lucky, because the next year was the epic winter - the furnace went out/ our YouTube tricks didn't get it running, and the red plan ($500/yr) meant we pushed to the top of the queue and got someone out when the temp was dropping in the whole house. Apparently the part needed to fix it was over $1,000 (not including install), and that was covered in our plan. So that proved the value for us! I know they were recently acquired/ merged with FH Furr, so it appeared that our online requests for service on the KCS site were not actually being seen/ addressed. When I got time to call over, the former red maintenance plan was unfortunately no longer sold by this new company. I got the "gold plan" which includes 2 HVAC inspections, a plumbing inspection, and an electrical inspection for honestly a price that is so cheap I'm worried it's going to be an upselling scam :/ so I'll update this as needed in the future to help others who may wondering if this new company will have the same service quality as pre-acquisition. read more

My elderly mother has a service contract with them. Her 4th floor condo is 89° and was told at 10:30 am yesterday that someone would be out that day for diagnostics. [[HIGHLIGHT]]We waited for 11 hours, then called and we're told that despite partnering with FHFurr, they were short-handed and someone would be out for the first appt 8-9 am today.[[ENDHIGHLIGHT]] [[HIGHLIGHT]]It's noon, there's a dangerous heat advisory especially for a 93 yr old, and we haven't heard anything[[ENDHIGHLIGHT]] read more

We wanted a regular maintenance check on our 3 year old Trane system and we had concerns that it was producing louder than normal sounds. However, they came out and assured us everything was in working order. No upselling or additional fees beyond what was agreed upon up front. Great insight, knowledge of the system, and advice. Will definitely call again! read more

[[HIGHLIGHT]]Purchased a mini-split for my basement renovation when these folks came to my rescue after 3 other companies flaked out on me.[[ENDHIGHLIGHT]] I can't say enough good things about these folks. The experience and thoughtfulness of their work is terrific. [[HIGHLIGHT]]They work with you and answer all your questions and offer advice to help make decisions when you're getting your system modified, installed or repaired.[[ENDHIGHLIGHT]] Very prompt service, they're clean and efficient at what they do. They don't try to sell you something you don't need. They are my new HVAC company for my house! read more

[[HIGHLIGHT]]after repeated phone calls to this company (i am talking abour a half dozen phone calls) to obtain the paperwork for a very expensive repair they did to my hvac line, they have failed to return my call or provide a copy of the paperwork for the work they did[[ENDHIGHLIGHT]].... any company that ignores its customers should be reported to the state which i am about to do, and never, never go into your home to do work. read more

This company was recommended by Choice Warranty April 8th .I would not recommend this company. I paid for my microwave to be repaired, and it is still broken. [[HIGHLIGHT]]I have made numerous calls to contact them and have heard no response.[[ENDHIGHLIGHT]] read more

[[HIGHLIGHT]]Great people[[ENDHIGHLIGHT]] Honest Great service Quick Will use them again and already refer them to neighbors [[HIGHLIGHT]]Hard to find a great company like this.[[ENDHIGHLIGHT]] read more

KCS has been servicing my HVAC for a couple of years. They are always professional and timely. My AC was not cooling sufficiently and technician Brian Maupin explained what was wrong, gave me several options and replaced the needed part in a timely manner (even in pouring down rain). I highly recommend KCS and give Brian Maupin five stars. read more

Anibal is amazing; super skilled and knowledgeable, he quickly and expertly diagnosed and fixed our HVAC system. [[HIGHLIGHT]]He is also super friendly - exactly the kind of person you hope to get when you need help.[[ENDHIGHLIGHT]] read more

We have been customers of KCS since 2014. Their technicians are all very friendly, knowledgeable, and professional.

Bi-annual service that Andrrew performed well. KCS is top-notch, in our opinion. Using them always. read more

We've owned our home for nearly 4 decades. KCS Heating is the best HVAC service provider we've ever had. Good personnel, prompt, fair prices. read more

I was directed to use this company to repair my Friedrich wall unit for warranty repairs.. Took months to locate the replacement part after needling and calling for an update. [[HIGHLIGHT]]They never called me back to give an update since.[[ENDHIGHLIGHT]] I gave up. I will NEVER refer anyone to this company. John read more

I have been using KCS for approximately 6 years. Their service is great, the are honest. My A/C unit is 16 yrs old, They told me it should last another 3 to 5 years. Most of my neighbors have already replaced theirs. read more

Extraordinary annual maintenance service appointment. Brian, the technician, was knowledgeable, professional, and very personable. He identified (and fixed) issues that other firms had overlooked. [[HIGHLIGHT]]The customer interface (Text, email,, website) was easy and responsive[[ENDHIGHLIGHT]]. I went with KCS after my past HVAC company was absorbed by a larger and less personable company. The bigger company was unresponsive and sent out less reliable technicians. I saw KCS working in the neighborhood and called them after watching them work on a neighbor's system. Best decision I've made in a long time. Totally recommend KCS for your HVAC support. read more

Last summer our AC unit was having issues where the top floor wasn't cooling where as the main floor and basement were. The top floor is in its own zone while the main floor and basement are in another zone together. Anyways, we called one company to come out.. they re did some wirings and said it might be a circuit board that is wrong but said hopefully they fixed it. They didn't install a new circuit board, but reset some stuff and re did some wiring and charged us a fee. A week or so later we realized it wasn't fixed and the issue was still there. By now it was almost the end of the summer and we figured it would get cooler sooner so we didn't really focus too much on having the system fixed. Fast forward to this year, we called another company (one man person/shop recommended by our community). He diagnosed it as a different problem (not the circuit board, but one of the electrical dampers was broken). Since he is a one man shop, he only fixes the main AC units and not things related with the HVAC system. Thankfully he did NOT charge us for this diagnosis fee or any fee since he wasn't able to fix it. We then called KCS Heating and Air because they had good reviews and decided to give them a try. Third time is the charm! They came out, diagnosed the problem the same as the second person/company as being with the electronic damper. They took some photos, wrote the model numbers down, went back to the office to work up an estimate. It took a few weeks due to the busy beginning summer heat season, but they eventually got back to me with an estimate and appointment. The appointment to replace the board was delayed because they were running late that day and overbooked, but they did call me and ask if it was possible to reschedule, which was fine and understandable. Finally the technician came to our house and replaced the part and tested everything out. Everything works great again and how it should. It has been about a month now and things are great. The house is nice and cooled evenly even in this 90 degree weather. Highly recommend KCS! read more

Had KCS come out to replace our entire HVAC system. Their customer service over the phone was friendly and helpful, and they were able to immediately schedule an appointment for a consult. When the sales representative came out, he was detailed and thorough providing several options and explaining all elements of what could be purchased. He explained the price point for each option and guided us through the financing options available. The service was completed and was efficient. We are super pleased with the results. read more

KCS came out for an a/c repair. The technician replaced a faulty capacitor in less than a half hour. The service/diagnostic fee was $125. with an additional charge of $199, for the part, a JARD 12783 dual capacitor. Checking online prices, the part can be bought for as little as $6.86., and up to $20. or more. KCS Heating and Air justified the 2900% markup, saying, "We are a small family-owned business . . ." ($11.4 million revenue [zoominfo.com] ), and their ". . .pricing is based off of a national average." I concur with their response in Google reviews, and am truly hoping this review affects their (pricing) policies. read more

For more than a decade Neal and Lindsay have led a super crew of knowledgeable and friendly technicians My most recent call was answered first thing Monday and the furnace was running by 3 read more

Neal was awesome to work with and the office staff is professional. I highly recommend this Company. it was refreshing to have a smooth transaction without being taken advantage of. They installed a new AC unit. read more

Great company to do business with, reliable and straight forward!!! They will do what they promise and ready to help with any problem you may have. You can look around, but they are still the best!!! read more

[[HIGHLIGHT]]Everything went perfectly![[ENDHIGHLIGHT]] Couldn't have been happier!! Easy to set appointment, came on time, work completed. Grateful. read more

We contacted KCS during one the hottest heat waves we've had in recent years. They were able to respond after hours quickly and sent someone out the very next day. Jacob was our tech and he couldn't have been nicer. He inspected everything and suggested multiple solutions and advised us what he would be doing. He spent hours in our hot house and in the heat to troubleshoot the issue. He was super honest and friendly. He never complained once and even made jokes with us. Loved working with him! This company is a gem and I would recommend them to anyone. read more

We lost the A/C in the upstairs of our house during an extremely hot day. Upon contacting KCS, the KCS team responded within less than a 12-hour period during a very busy time, analyzed the problem, and alleviated the issue in short order. We continue to be amazed at KCS's technical abilities and professionalism. They are truly a top-notch service organization. read more

KCS is the best company we have used in the Manassas Bristow area. Great value for money.

KCS Service is professional and friendly. Andrew does a great job with our semi-annual maintenance check ups.

KCS performed a major service resulting from our compressor becoming inoperable. The timeliness and quality of the repair exceeded my expectations. The cost of repair and overall quality of the service were exceptional. read more

The technician Anibal was extremely helpful. He took care of the situation and my heating unit is now working perfectly. I would recommend Anibal and KCS to anyone who has an HVAC problem. read more

I was refer to KCS by my previous AC company when they stopped service calls except installations and under warranty, I called KCS when I needed a technician To make a repair. KCS got right back with me and I booked my repair. They arrived on time, were very polite and explained everything to me. The problem happened a week later, they came back right away, fixed it, explained what the problem was,I am very pleased with the company. Will be calling them again. read more

I've had great service from KCS Heating & Air for the last 5 years. I''ve also referred them to several of my real estate clients. Always great service! read more

KCS did a full 5-ton HVAC system installation and everything is working well so far. Carlos and Brian and the rest of the installation team were excellent. It was two years ago and it's working well. The maintenance teams have been excellent. Highly recommended read more

Best HVAC company I've ever used. Incredibly responsive! Technicians are all comprehensively trained, polite and efficient. Their prices have always seemed a bit less expensive than the competitors. I learned about KCS from numerous neighbors, all of whom enthusiastically recommended them! read more

After having an overwhelming feeling our old heating and air-conditioning company was trying to rip us off, we turned to KCS Heating & Air. They could not be more honest. They came out and found a quick and easy fix to our old heat pump when the previous company was giving us the hard sell that we needed a new heat pump. That was years ago. The old heat pump is still going strong and KCS is our new heating and air-conditioning company. When we moved from Manassas to Fredericksburg, we were delighted to learn that Fredericksburg is in their service area. Now they are servicing our new really old heat pump in the older home we bought. Not once have we felt pressured into getting service we don't need. I highly recommend KCS Heating & Air if you want an honest company who will treat you like family. read more

You'll love KCS. They have knowledgeable and friendly service people, and they always keep you informed about when they will arrive and what they will do to service your AC. I am confident in their recommendations and the quality of their work. read more

Services are great, the technians comes to the house are pleasant and efficient. Very helpful in explaining what the problem is and various options. They are usually very quick to come in a reasonable amount of time. I have used KCS for more than 10 years. read more

Ever since KCS took over from Comfort Professionals, I've had nothing but consistently good, high-quality service from them. If you're looking for a thoroughly reliable HVAC company, you couldn't do better than KCS. Five stars! (Disclaimer: I have nothing other than a customer relationship with KCS.) read more

Having a background in the industry, I chose the KCS organization because I was familiar with the owner of the company and was aware of his level of expertise and experience in the HVAC space. I also knew about his work ethic and integrity; two things not always present in the service industry. I found KCS Heating & Air to be a Full-Service HVAC Company from "DayOne." They did respond quickly serviced the issues expertly and provide scheduled follow-up service to keep my HVAC equipment in peak operating condition for longevity but most importantly for the safety and security of my family and our home. read more

Excellent customer service very professional and knowledgeable. The tech Evis was professional and informative. I highly recommend them and will definitely use them again. read more

KCS has helped us with boiler heat and air conditioning repairs for the past three years. They are extremely professional and don't try to oversell. Last year Robert helped us immediately with fan issues on our old HVAC unit on a very hot day when my wife was pregnant. We just had our AC replaced and installed yesterday and Brian and Carlos did a great job, staying until the evening to make sure everything was completed effectively. read more

Very Professional and honest people working for this company, from the front desk to the supervisor to the owner and specially the technician Robert who is a very hard working person. I highly recommend KCS to anyone looking for HVAC work done. read more