Popular Cities
24 companies listed · 12 in Thornton · 7 open 24/7 · 18 open weekends · 23 rated 4.5+
Data verified October 28, 2026
The 24 companies listed for Thornton, CO work on furnaces, heat pumps and air conditioners. Each profile repeats what the company publishes about its hours, its license and the equipment it fits, alongside ratings and quotes drawn from public reviews.
Of the 24 companies we list here, 12 are in Thornton itself and 12 come from towns including Denver (6, 11 mi), Commerce City (1, 7 mi) and Brighton (1, 11 mi). The companies on this page are rated from 4.4 to 5.0 across 10,106 reviews; 18 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (93%), responsiveness (84%) and quality (82%). 7 are open around the clock; 17 are open on Saturdays and 13 on Sundays. The services the companies on this page list most often on their websites are air conditioning (2), heat pumps (2), heating (2) and indoor air quality (2). 7 show a license on their websites; 4 list staff certifications (NATE and EPA) and 10 have a BBB rating of A or A+. 12 have ten or more years of experience, the longest 59 years. 11 offer emergency call-outs; 16 offer financing or payment plans; 9 give free estimates; 10 are family- or locally-owned and 15 list coupons or special offers. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Saturday or Sunday hours show up for 18 of the 24 companies here. Saturdays fill with the calls that came in on Friday, so ask whether you are getting a repair slot or a sales visit. Sunday work is usually treated as an emergency call.
- “The team at All Climate was professional, friendly, knowledgeable, and extraordinarily fair with their prices and offers.” — customer of All Climate Systems Heating & Cooling
- “Fast, professional and so friendly ! He got our furnace working the same day !” — customer of VO Heating and Cooling
- “Daniel is very professional and knowledgeable. Explained furnace problems very well and provided options.” — customer of Standard Heating and Cooling
- “The technician showed up on time and fixed my furnace in one visit.” — customer of Impact Heating & Cooling Inc.
- “They were professional and clean and went above and beyond in making it easier for me to access the furnace and move around in my crawlspace.” — customer of All Climate Systems Heating & Cooling
Excerpts from public reviews of the companies listed on this page.
