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Emergency HVAC Contractors in Janesville, WI (2026)

Top 50 of 83 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

If you smell gas, leave the building now and call your gas utility or 911 from outside.

The short answer

  1. 1

    #1 for emergency heating and cooling in Janesville: 24HR Home Comfort Services, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency HVAC contractors in Janesville at a glance

Top emergency HVAC contractors in Janesville at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
124HR Home Comfort Services674.9★ (2,863)Milton, 8 mi away24/7
2Rock Valley Services, Inc.654.9★ (443)Janesville24/7
3Perfect Temp Heating & Cooling604.8★ (719)Loves Park, 25 mi away24/7
4Edelman Heating, Cooling, Plumbing, Electric & Solar594.8★ (396)Elkhorn, 23 mi away24/7
5Air Systems, Inc.594.8★ (277)Elkhorn, 22 mi away24/7
624/7 Home Comfort Services583.8★ (4)Janesville24/7
7Clark Heating & Cooling Inc574.6★ (62)Stoughton, 20 mi away24/7
8MP Heating & Air Conditioning564.7★ (54)Machesney Park, 21 mi away24/7
9Troys Heating and Cooling564.9★ (21)Madison, 17 mi away24/7
10G-Force Home Solutions565.0★ (30)Whitewater, 20 mi away24/7

Call an emergency HVAC contractor in Janesville now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency HVAC contractors in Janesville, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 83 is on the HVAC contractors page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  5. #5 Air Systems, Inc.

    Based in Elkhorn, 22 mi away

    59/100CR Score

    Ranked #5 because of its Google rating and trade focus: 4.8★ from 277 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 277 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4520 Co Hwy F, Elkhorn, WI 53121
    View profile for Air Systems, Inc.(262) 728-1655

  24. #24 Forest City Services

    Based in Machesney Park, 21 mi away

    53/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “HVAC contractor”.

    • 4.2★ from 5 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    10810 Banyan Dr, Machesney Park, IL 61115
    View profile for Forest City Services(815) 877-7025

Top 50 of 83 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

HVAC contractors in Janesville, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Bonnell Heating & Air Conditioning525.0★ (3)24 mi
27Lake Geneva Heating And Cooling504.3★ (24)25 mi
28ProTech Plumbing, Heating, & Cooling484.3★ (6)25 mi
29TNR Heating & Cooling LLC485.0★ (4)In Janesville
30Appliance Repair Experts484.8★ (1,444)In Janesville
31J. C. Heating and Cooling, Inc.475.0★ (385)In Janesville
32South Central HVAC, LLC465.0★ (14)15 mi
33Four Seasons Comfort Systems453.8★ (4)9 mi
34K & D Heating & Cooling LLC444.3★ (10)18 mi
35Germundson Heating & Cooling435.0★ (5)18 mi
36Lloyd's Plumbing & Heating Corp434.2★ (126)In Janesville
37Mlsna Gary & Son Heating & Air Conditioning424.4★ (7)22 mi
38Don-Martin Heating, Cooling & Geothermal Inc.425.0★ (26)In Janesville
39Al Beyers Indoor Comfort Systems424.1★ (65)In Janesville
40RuAh Heating & Cooling, LLC424.3★ (6)23 mi
41Quigley-Smart, Inc424.3★ (240)9 mi
42R&W Heating & Cooling Inc415.0★ (52)8 mi
43Thiele Heating & Air Conditioning Beloit414.6★ (112)10 mi
44Air Control Heating & Cooling LLC415.0★ (12)In Janesville
45Advanced Heating & Air of Rockford415.0★ (4)25 mi
46Dohner Heating & Cooling LLC404.9★ (46)10 mi
47Polar Refrigeration & Heating Inc404.6★ (9)In Janesville
48Stanton Heating & Cooling LLC405.0★ (7)In Janesville
49Janesville Heating & Air Conditioning Inc.403.2★ (25)In Janesville
50Ctc heating and cooling solutions llc403.8★ (10)In Janesville

How we ranked emergency HVAC contractors in Janesville

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency HVAC contractors in Janesville: questions

Which HVAC contractors in Janesville are open 24/7?

25 on this list post 24/7 hours, including 24HR Home Comfort Services, Rock Valley Services, Inc., Perfect Temp Heating & Cooling, Edelman Heating, Cooling, Plumbing, Electric & Solar and Air Systems, Inc..

Who is ranked #1 for emergency heating and cooling in Janesville, WI?

24HR Home Comfort Services is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Janesville ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the HVAC contractor arrives?

If you smell gas, leave the building now and call your gas utility or 911 from outside.

How many emergency HVAC contractors here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Janesville

  1. October 2026: CR Scores recalculated for 83 hvac contractors serving Janesville.
  2. October 2026: 1 duplicate listing merged.

More emergency and heating and cooling pages