HVAC reviews across the US

We have a boiler in our home and we had such a hard time finding someone to work on it. We found Jay and I’m so glad we did. He is so knowledgeable and really took the time to walk us through the system and how it works. He was also able to fix the issue we had with the boiler and showed us what to do in the future. His office staff is incredible as well.

Was a little nervous reading some of these reviews prior, but Caldera did an excellent job fixing our AC and replacing our capacitor! We have HSA home warranty. Luis and Omar were very friendly and respectful. They even arrived earlier than they planned to on the day of when I called them to let them know our condo office and maintenance personnel would be out of office if they came later in the day. They fixed the issue quickly and also took out our old yucky filter for us and told us exactly where to get a replacement filter and what size. Really appreciated their responsiveness, timeliness, and courtesy!

I won't even get started on American Shield and how unsatisfied we are with this warranty company. They cover barely anything when it comes to cost but Caldera is an awful service to use. We got scheduled out several weeks when our AC went out and had to find a hotel for several days due to the 100° heat only for Caldera to reschedule with us and tell us they'll have to come next week. Our house would get up to 96° and we have two small children and pets. We had just bought our house a few months prior so didn't know the AC would go out. The day of the appointment comes and of course we're told they can't make it by that time the afternoon but can be there around 11 pm. I said no and to come the next day. He says he can be there early in the morning. Wouldn't you know he doesn't show and says he'll be there in the afternoon and the afternoon rolls around and no show again . He ends up showing at our home after 10 pm when my fiance is home alone and our children are supposed to be sleeping due to school the next day and my fiance wanted to be in bed due to going through chemo treatments and was exhausted and weak. Not to mention his wife just sat out in the truck the whole time. Completely unprofessional and very very weird experience. You do not as a business show up to someone's home to fix their AC after business hours and at 10 pm no less. You show up between 8-5 and that's it and don't continue to reschedule times. Show up at the time and date you said. Ridiculous and then they don't agree that they're unprofessional and it's fine to show that late. Not a good company. I'd give 0 stars if I could. AC isn't even fully fixed either.

Wow… never have a business experience like this one. Came out replaced my whole air conditioner unit, because my previous one was leaking. Charged me $5,500. Was fine the first summer, now this summer is around and it’s leaking ALOT again. Hasn’t even been a year, and they want to charge me $100 to come and just LOOK what’s going on.. telling the lady in the office and she’s trying to say since it’s been OVER or CLOSE to a year(she couldn’t decide which excuse to use) she has to charge me $100… she ended up hanging up on me because I was so frustrated I cursed like the grown woman I am. Would NEVER recommend this company or people to ANYBODY.

UPDATE : because it got worse than just this. After reaching out to the techs that came out and installing the unit, they apologized to me for how the lady in the office (owner) treated me and explained they charge a $100 service to matter what, doesn’t matter time frame but they lowered it to $75 for me for the inconvenience. I never got an email to confirm the appointment so I called the day they were supposed to come out to confirm, owner apologized for the convo that had happened and agreed to the $75, and confirmed they would show up that day to come look at it. About 30 minutes later she calls me to tell me her husband said they refuse to service me anymore because of the review I had left and because I am friends with a former employee with them that apparently didn’t work out. Even tho I have an invoice from them saying 1 year warranty for maintenance & equipment. They didn’t call me back that day, I sent an email of the invoice showing the proof of warranty and they replied and acknowledged the warranty but I still need to pay the $100 service fee, which I had already paid and they also called me liar about the tech saying they’d lower to $75 , so I sent the messages of the conversation proving they agreed to $75. Called back the next day and they tried to push it out another week to come and take a look, angry I agreed and paid the $100. My husband ended up going down and taking a look himself with a friend of ours (their old employee) and figured out the drain was plugged and causing the leaking. I then called them and canceled the appointment and they said they refunddd the $100. After a week & a half , the money was never deposited back onto my card so I called and they tried to tell me the payment never went through on their end so I double checked my statement and it showed it went through so I sent proof of payment to them via email and called back the next day and they then said the bank said they never received it and they would look into it. I waited 5 more days and it still wasn’t resolved, I called my bank to make sure payment was transferred and they confirmed it was successful. I went into office to try to get proof that it never was deposited on their end, the lady owner then tried to say it shows it was a merchant error and she would go to bank and see what went wrong. I then got a call from the guy owner only two hours later that they found it, that they had a lot of service fees deposits that day and they missed mine. Which shows that the owner lady was lying to me the whole time. Again, I would not recommend these people or company to anybody. They are not honest people and have no integrity.

I can not recommend this company based on my experiences with them. I have been waiting months for a simple repair authorized by my Home Warranty company. They indicated the repair was complete to the home warranty company and have been paid for the repair but haven’t been back to complete the repair…ever. There have been several
appointments made and no one shows or calls. Now they say they have the wrong parts. Excuse after excuse without remedy. I urge you to consider anyone else before using this company. You will regret working with them. I know I have.

Run!!! If you ever need service from this company, they are a joke AHS had to hire another company to fix the A/C installation Pics speak for themselves.

If you have American Home Shield and are reading this, it’s probably too late. It is my opinion that they treat their warranty customers as second class compared to others (based on reviews I’ve seen and my experience). I had another reputable company take a look and while the repair needed is correct, we believe Caldera inflated the cost of the uncovered items in an effort to make as much money off the call as possible. On top of this they LIED on past claims and said they did things they did not. Would have loved to speak with someone before writing this but I have tried contacting my warranty company who have requested me to receive a call from Caldera, I have called several times and no response in a week. Apparently my option is to just shut up and pay the charges because there is no speaking with anyone to ask questions. I will be filing a complaint with AHS about how they treat customers.

Edit to respond to the comment below:
Yes, I absolute acknowledge that you correctly diagnosed the issue (despite you coming twice last year and INCORRECTLY diagnosing it, lying and saying you checked my outdoor unit, lying and saying a part was replaced that wasn’t). My issue is the other professional opinions about how you inflated the uncovered costs to, in my opinion, make more money. And then, when I tried for well over a week to call and ask questions I received no response till I left an honest review of my experience. During that call I was condescendingly told that you’d gladly come fix my ac as long as I removed my review. Absolutely no acknowledgement of your service, and no answers to my questions. As far as what the warranty covers, yeah - it sucks not to have it just all covered, but that doesn’t give you the right to inflate the cost of the modifications for your own benefit.

The worst. Put in a brand new AC unit outside and inside and it still doesn’t work. Owner promised us free duct cleaning bc of all our problems, never did it. We called about our AC not working and they answered our call once when they thought we were a new customer and after that time will not answer our calls. Karma. All I can say.

Seem like really nice people, but did not come when they were supposed to, 4 times, over 2 weeks in and heat still not fixed in Feb in extreme cold. This was done thru a warranty company hence the 4 times out and still not fixed. Lied to warranty company to where they would not cover any repairs. Ended up calling another company out of pocket to come look, and they said the wrong part was put in it that didn't even go to my heater, that being the only part caldera put in my heater. My family freezing did not seem urgent at all to them as they kept changing dates around to show up, came by 1 time when I was at work n say oh well we tried to come by but no one answered now we can't come back for another few days. Would agree on a day and time, then just not show up and I would have to call them again to see what's going on since I didn't even get a call to tell me they weren't coming. They said it was because the distance, not in the area, well don't take the job if you're not gonna do it, or do it right. Left it in worse condition then what it originally was, have photos, video, before, after and during. Don't fall for the "you need a duct cleaning" paid about 300 for them to bring the small propane tank looking thing with about a 12 inch straw type tube, blew for about 3 minutes and said it was done. Also cracked and left that whole in my chimney open. Had another heating company repair everything caldera messed up. Also don't bother with their warranty because that's also lies, I was stupid and initially got it included with the duct "cleaning", then a month later got a call of them trying to sell me the same thing I already bought from them. I honestly never tried to use it since I don't want them to come break what someone else fixed.

Our furnace wasn’t keeping the house warm. My husband called and they said that they could come out the next day. They showed up just after 8 am and were done just before 10. They were very professional and nice. They explained everything and even moved the company van so that I could leave to run an errand. The young man was very knowledgeable and asked questions. We will be using them again. The last name is Zevik not Ness.

My furnace broke down and a service technician came to look at it diagnosed we needed new furnace. They got my old one running temporarily and had me on the schedule to get a new one installed. Three days later we have a brand new furnace! What a great company.

Air Tech has been my HVAC company for 15 years. Wednesday 1/7 my son went to our cottage to find that furnace was not working properly. Thursday 1/8 serviceman was at cottage and diagnosed furnace problem and found old wiring error on Nest Thermostat. Friday serviceman installed parts needed and wired furnace correctly for Nest Thermostat.
Doesn't get any better than that!

I requested estimates from a few HVAC and plumbers. Our boiler was 45 years old and we have a historic home. Old boiler still worked but we wanted to replace it BEFORE it failed. Others were intimidated by the job and nervous about the old cast iron radiators. Not the Airtech guys! They were $7,000 less than one quote. They did an outstanding job. I called them a few days later because the house was too warm upstairs. They came right out and checked to make sure everything was operating as it should before I started closing valves. This kind of service is rare these days. Skilled professional installation on time and on budget. No charge for the recheck. Above and beyond our expectations.

I have used Air Tech for years due to their customer service, and the knowledge of their tech's. I recently had a garage heater installed and the installation was compleated with expertise. another GREAT job by Air Tech.

Air Tech is the Best. During a very cold spell, the furnace stopped blowing heat. I called and Matt came out right away. Found the issue and we had heat again.
Several days later, Teagan came and did a thorough cleaning.
From the people who took my call, and to both men, everyone was extremely polite and professional. My furnace and AC unit are over 23 years old. I will only go to Air Tech for new ones. Thank you Matt, Teagan, the ladies that took my call. Your friendliness, outstanding customer service is second to none.

My furnace was short-cycling in the beginning of January 2026. AirTech came out and worked with me to resolve everything in the 5 days I didn't have a running furnace. They diagnosed, came to give a quote on a new one, and even installed quickly. Thanks AirTech!

My furnace stopped working. On Saturday I called Air Tech and a technician Jason came in one hour of my call. He explained me about the problems and gave me an advise to replace furnace with a new one. On Monday I got a call from Ben with quotes on some new furnaces and on Tuesday by noon it was installed at my home and running. The technicians were so nice and did an excellent job. Heather was so wonderful, too. I will recommend Air Tech as I am a very satisfied customer and I am so happy I chose Ait Tech Heating to get a new furnace. Thank you all who works there.

Our furnace died on a Saturday evening. I called Ziegelbauer and left a message. In a matter of minutes Cathy called me back. The weather was turning extremely cold (below zero) so Cathy arranged to have a tech come out and see if they could get it going (26 years old furnace) and leave heaters if they could not get it going! They couldn't get it going so they left the heaters. Scott set them up and explained everything to us.
Our 2000 sf house stayed about 56 degrees with the below zero weather. The heaters they brought were safe and worked great! Monday morning they were installing a new furnace! They could not have done a better job! Cathy, Scott, Jeremy and Josh were all awesome! They were so friendly and professional. We could not be happier!! We highly recommend this company for any HVAC work you may need done!!

I just has a great experience with Josh. He was friendly, professional, timely, and knowledgeable. The response time was fabulous! I called and he was onsite within an hour.

I can't say enough about this company, I was hoping to get someone today when I called around 11. The furnace and ac are back online and all is well.

Thank you Josh, and Ziegelbauer HVAC!

These guys are a one stop shop. They can even accommodate unique jobs at affordable prices with custom in house fabrication. They will explain their processes and explain the costs. They hold their word when scheduling appointments and answer the phone on emergencies.

They are amazing! Last winter super busy during the cold spell, as soon as I said I just had a baby, they were here quick to fix my furnace. Couldn't be happier with the service my family ways gets. My family has been customers for over twenty years.