Rock Valley Services
“Rock Valley was very quick to get me scheduled and John was very friendly and efficient .”
Best HVAC Contractors in Janesville, WI
15 companies listed · 5 in Janesville · 1 open 24/7 · 2 open weekends · all 15 rated 4.5+
Data verified October 20, 2026
J. C. Heating and Cooling
“Friendly technician arrived on time, checked our unit, offered some options for making it work better for us.”
Don-Martin Heating
“The total cost for the repair was very reasonable, and he provided me with a breakdown of the costs for parts and labor.”
Air Control Heating & Cooling LLC
“Furnace went out, he came right away and recommended an efficient unit to replace that was able to be installed the following day!”
Tri-Cor Mechanical LLC
Atlas Ice Machines LLC
The 15 companies listed for Janesville, WI 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.
Area overview: Janesville, WI
Of the 15 companies we list here, 5 are in Janesville itself and 10 come from towns including Milton (4, 7 mi), Beloit (1, 10 mi) and Cambridge (1, 11 mi). The companies on this page are rated from 4.5 to 5.0 across 678 reviews; 3 have 50 or more reviews. When customers rate these companies on specific qualities, they most often praise professionalism (96%), quality (90%) and responsiveness (86%). The topics that come up most in reviews of the companies on this page are "price", "efficient" and "estimates". 1 is open around the clock; 2 are open on Saturdays and 1 on Sundays. 5 show a license on their websites; 1 lists staff certifications (EPA) and 5 have a BBB rating of A or A+. Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 2004. 3 offer emergency call-outs; 4 offer financing or payment plans; 3 give free estimates; 5 are family- or locally-owned and 3 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.
Why do some of these firms show another city?
5 of the 15 companies are based in Janesville; the others come from other towns within 15 mi. This trade drives to you, so a shop over the county line is normal. Ask whether your address carries a travel charge.
Thiele Heating & Air Conditioning Beloit
“The Communication was good they called and let me know when they were coming to my house and were on time and called when they needed to cancel for bad weather.”
R&W Heating & Cooling Inc
“Despite being exceptionally busy, they had a wonderful service tech at our house before 11 am!”
FB Reeder Plumbing
“Replaced hvac aircondiitoner and installed minisplits nice install professional honest and reduced charge since install changed .”
AE Heating and Air Conditioning LLC
“I would recommend these guys to anyone looking for installation or service.”
ACS Air Care Specialists l Refrigeration Contractor
“They installed my furnace last October and it ran wonderfully through the arctic blast!”
Dick's Refrigeration Inc
“I called them to see what they could do about my refrigerator running and they actually caught it”
NK Plumbing Heating & Cooling LLC
“My basement flooded they came in and found that my sump pump stopped working.”
Riteway Heating
“Will be calling him for any future heating or cooling needs .”
Fabtek Custom Sheet Metal & Hvac
“Mark did an excellent job on my basement.”
Why these companies made our list
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