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24 companies listed · 10 in Fremont · 6 open 24/7 · 15 open weekends · 20 rated 4.5+
Data verified October 18, 2026
The 24 companies listed for Fremont, CA 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, 10 are in Fremont itself and 14 come from towns including Livermore (3, 17 mi), San Jose (2, 17 mi) and Milpitas (1, 8 mi). The companies on this page are rated from 4.0 to 5.0 across 4,872 reviews; 15 have 50 or more reviews and 20 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (90%), responsiveness (75%) and quality (75%). 6 are open around the clock; 15 are open on Saturdays and 14 on Sundays. The services the companies on this page list most often on their websites are heating (4), cooling (3), air duct cleaning (2), furnace installation (2) and furnace repair (2). 11 show a license on their websites; 3 list staff certifications (NATE) and 7 have a BBB rating of A or A+. Domain records put 13 websites of the companies on this page at ten or more years old; the oldest dates from 1999. 8 offer emergency call-outs; 10 offer financing or payment plans; 11 give free estimates; 10 are family- or locally-owned and 12 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 15 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.
