HVAC reviews in Denver, Colorado

Good people and a good job

Prompt call back, I didn't have to wait long for him to order parts and have my unit up and running! Very professional.

Great customer service! Nice people.

They came on time. Great friendly service on my AC and furnace.

Great customer service! Went out of their way, were super helpful and informative.

Made an appointment a few days in advance for a swamp cooler startup. They never showed or even bothered to call.

Cherry is wonderful! She knows what she is doing. Glad she fixed our AC in time for hotter weather

Jason is great, called them about my ac not working, they showed up fast, got my ac back up and running for my kids birthday party, fast and efficient service, great customer service, definitely got a customer for life from not just myself but my family and friends as I will recommend them too every one I know, thanks again for the great work

Jason has taken care of my rentals and my home. Both have boilers and ac. Someone you can trust to do the job right and great quality for the pricing.

I have had a really good experience with these guys! Cherry and Aaron were really professional!

Big Dog is awesome! They knew what they were doing. Cherry the owner was an amazing advocate for me when the warranty company would not cover what they should. Amazing company.

I couldn’t be happier with the service from Big Dog Heating and Cooling. They were efficient, knowledgeable, and clearly committed to delivering great results.

My home warranty company sent Big Dog
out. Initial visit diagnosis was bad pilot assembly on my boiler heating system. It was over the new year weekend so they came on the 3rd. Before he worked on it the unit had fuel and would ignite and produce flame to the burners but then would go out. This would repeat several times before finally shutting down. Technician removed and replaced the pilot assembly and cleaned up the system. Upon reassembling he found it was not getting gas. So he thought maybe he reassembled it wrong.
He retired to his truck for nearly an hour when he returned he said the gas valve needed replacement and that is why it’s not getting fuel. Warranty company would not cover new gas valve and it would be $675.00 to replace the valve!!! So wait a minute. It was getting gas before he worked on it now it’s not. Seriously? And they want $675.00 to fix his mistake!?
I told him to put it back together and I’ll call someone else!

Terrible service, misquoting, over promising and under delivering. Hasn’t made one appointment that they’ve set on time. My AC has Been out for about two weeks now under their service and care. Will not follow up when reached out to. Should be reported to the BBB.

Scam .. going door to door stating people are getting high penalty with the energy company for high usage. My bill doesn’t show any such fees and isn’t even that high. They don’t have access to my billing. Bad sales pitch!

The technician was very nice. He arrived on time and worked with my home warranty people get my repairs approved. While all the problems were not corrected he did admit he wasn't sure what the problem was and the fix for it he would reach out to other techs in the company for advise.

If you want a quality service-this company is not for you. Our ac went out and it was an emergency to repair. They scheduled an appointment for Tuesday and never showed up, rescheduled for Thursday and never showed up. Not answering any calls. Save your time and stay away from this company.

I'm only giving this company a star because you have to to leave a review. If it were up to me I'd leave no stars. They are horrible in every aspect of business. Is this actually a business or a scam. They will take money perform no service and refuse to help. This was the most unprofessional business I have ever dealt with. I work with the public and will be spreading the word of their scammy dealings and unprofessional behavior to anyone who will listen. I hope anyone who needs work would consider all the bad reviews and not use this company.

I find this company exemplary in response to service and troubleshooting, dedication to the customer, and reliable technicians. Thank you for all your hard work when dealing with replacing the heating system in my home, (built in 1908, which came with numerous issues). I was impressed with their ability to troubleshoot, resources they had at hand, and knowledge/experience!

Would like to leave 0 stars…

We got connected to this company through our home warranty. Our A/C went out during some near record highs. The first day the tech came out he didn’t use the gauges on the outside unit and went to our attic and said here’s your problem! You need a new thermostat. Cool. I have twin 7 month old babies. So I ask how can we get the temp down asap. He tells us He’s gonna order it and put it in the next day. Tells us he’ll be there first thing in the morning… he did not in fact come in the morning. Fine, schedules are tough I get that. By the time he gets there it’s after 4 pm and our house is 86 degrees and says well I guess it’s not just the thermostat. Goes out and comes back and says o don’t need to use my gauges I know exactly what’s wrong and tells me the unit is frozen so it’s low on Freon. I’m like cool can we fix it, I’ll pay upfront to get it fixed cause it’s hot and I have babies. He says yes, but then tells us he can’t because the coil is frozen so he can’t charge it. So he tells us to turn everything off and he’ll be back before any of his calls the next morning. Even goes as far to ask what time we wake up. I told him he could come at 3 am if it got fixed. I don’t hear anything back from them til 3:30 pm and our house is now up to 96 degrees. It’s now Thursday and when he shows up he says he can’t fix it today because there’s a blockage in the coil and that has to be approved by our warranty, and that can take 24-72 hours. We go out and buy a 300$ portable ac because obviously we can’t live like that. The next day I call our warranty and no paperwork had been submitted to them that we needed anything besides the thermostat. The warranty people reach out with no response. Saturday comes and I call warranty again, still no paperwork filed. This time I request a new contractor. The new guy (on time heating and air) comes out for 20 minutes tests everything and lets us know that the issue is we have too strong an air filter and it’s cause the system to freeze up. He takes the air filter out, tells me to buy the cheap ones, and our system works just fine.

Big Dog not only left us for 2 weeks without a/c (filed with warranty June 6, not scheduled til June 11, 3 calls to house on 11, 12, and 13, and didn’t get scheduled with the new contractor til June 19 for a total of 13 days) but continued to refuse to use the tools they had to make an accurate diagnosis, continued to make promises they couldn’t fulfill, and did not file paperwork they needed to in a timely manner to get us taken care of. The absolute incompetence and negligence this company showed my family knowing we had two small babies subjected to these temperatures is mind boggling. I wouldn’t recommend this company for anyone. They clearly do not know what they are being paid to do.

Loved these guys! They were available same day for my emergency AC replacement. Ive used them a fee times now and have had nothing but good experiences with them. Very highly recommend.