Call Today 24/7 Emergency Services 303-948-8808 | 720-404-8952



Extremely fair, honest and reliable. The company is a nice small business who actually cares and isn't always trying to up sell something. I will most certainly recommend to any friends and family. I was extremely satisfied with the service. From consumer to consumer, trust me, use this company and you will not be disappointed!! I never put reviews online, but this company deserved it.
Mike P., Littleton, CO
Furnace would not run on a very cold evening, and they fixed it by honestly cleaning a part and not selling me a new part. {They} knew the equipment very well. For more information or to receive a free price quote on a new installation, give us at Sentry Heating & Cooling in Littleton CO a call today!
Brian S., Littleton, CO
I called Tim when my air conditioning stopped working. I live in a condo and was told when I moved in that my AC unit was a unit on the other side of the building. Tim realized this was not correct and came out a second time to fix my actual unit. He was friendly, extremely knowledgeable, and he fixed my AC for a very fair price without ever trying to get me to replace it. Tim is a Veteran who served our country and he is still doing so! There is a reason why Tim has all 5 star ratings! Todd Kyle Littleton, CO
AWESOME! Tim was great! Totally honest, exceptional work and didn't charge me an arm and a leg and half my house!!! I asked him if we should replace the furnace since it's 12 years old and he said no and that Carrier furnaces last longer than 12 years! By his honesty with that, he saved us about $2000. You can't go wrong with Sentry!
Lisa E
I never write these things but I felt I had to today. I was at my wits end having no heat for a day in 13 degree weather. I called a ton of places and some were days out for appointments. I reached Tim at Sentry and explained the problem, he said he could take care if it within the hour. He was at my house in an hour and very courteous, professional and kind. He had my problem resolved in a few minutes and went beyond the job and cleaned my furnace at no additional charge. I not only would recommend Sentry but you should make it your first call! Could not be more pleased with my experience.
Rebecca Donato
A/C stopped working, they assessed problem quickly and repaired fast! Awesome job guys!
Elaine W.

Serving within a 50 mile radius of Littleton CO