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Emergency HVAC Contractors in Lake Geneva, WI (2026)

Top 50 of 160 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 Lake Geneva: Master Services Inc., 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 Lake Geneva at a glance

Top emergency HVAC contractors in Lake Geneva at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Master Services Inc.654.7★ (976)Lake Geneva24/7
2H. J. Faust, Inc. Heating and Air Conditioning644.9★ (1,340)Burlington, 10 mi away24/7
3American Heating And Air Plus LLC634.9★ (174)Lake Geneva24/7
4Black Diamond Plumbing & Mechanical Inc.634.9★ (6,580)McHenry, 21 mi away24/7
5Thielmann Heating, Cooling & Plumbing625.0★ (458)Burlington, 10 mi away24/7
6Edelman Heating, Cooling, Plumbing, Electric & Solar624.8★ (396)Elkhorn, 9 mi away24/7
7Midwest Heating & Cooling624.8★ (2,376)Mukwonago, 20 mi away24/7
8Air Systems, Inc.614.8★ (277)Elkhorn, 9 mi away24/7
9Comfort Cavalry Heating & Air614.9★ (1,086)Antioch, 19 mi away24/7
10Woodstock Heating, Cooling & Electrical614.9★ (1,222)Woodstock, 19 mi away24/7

Call an emergency HVAC contractor in Lake Geneva 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 Lake Geneva, 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 160 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.

  1. Ranked #1 in Lake Geneva

    #1 Master Services Inc.

    Based in Lake Geneva

    65/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.7★ from 976 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 976 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    N3481 Co Trunk H, Lake Geneva, WI 53147
    View profile for Master Services Inc.(262) 244-5650

  8. #8 Air Systems, Inc.

    Based in Elkhorn, 9 mi away

    61/100CR Score

    Ranked #8 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

  12. #12 The Thielmann Group

    Based in Waterford, 17 mi away

    61/100CR Score

    Ranked #12 because of its Google rating and trade focus: 5.0★ from 448 Google reviews, listed on Google as “Heating contractor”.

    • 5.0★ from 448 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    107 N Milwaukee St, Waterford, WI 53185
    View profile for The Thielmann Group(262) 304-0009

  14. #14 GSHA Services, LTD

    Based in Woodstock, 21 mi away

    60/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.9★ from 747 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 747 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1257 Cobblestone Way Unit A, Woodstock, IL 60098
    View profile for GSHA Services, LTD(224) 220-3660

Top 50 of 160 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 Lake Geneva, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Rellaire Smart Home Systems594.9★ (472)25 mi
27Broadway Heating and Cooling LLC585.0★ (33)10 mi
28Combined Services HVAC584.8★ (175)20 mi
29South Shore Heating & Air Conditioning Inc.585.0★ (104)20 mi
30Airtech Mechanical Services574.4★ (16)8 mi
31Absolute Comfort574.8★ (250)24 mi
32The Pure Air Experts575.0★ (108)22 mi
33A & B Heating and Cooling575.0★ (106)22 mi
34Boldt Heating & Cooling LLC575.0★ (62)20 mi
35Duane Blanton Plumbing, Sewer, Heating & Cooling574.9★ (105)22 mi
36AGM Heating & Cooling LLC574.9★ (147)25 mi
37G-Force Home Solutions575.0★ (30)16 mi
38C&C Heating & Air Conditioning574.7★ (28)15 mi
39Liberty Mechanical, Inc.575.0★ (8)10 mi
40American Heating & Cooling564.7★ (28)16 mi
41Active Heating & Cooling564.9★ (74)23 mi
42Optimized Air565.0★ (72)23 mi
43Arctic Heating & Cooling564.9★ (102)25 mi
44Hudak Heating & Air Conditioning565.0★ (16)15 mi
45American Comfort Central564.8★ (50)20 mi
46Bob's Refrigeration heating and air conditioning inc564.6★ (9)12 mi
47Biermann Heating & Air Conditioning564.9★ (45)22 mi
48A.B.D. Heating & Cooling565.0★ (38)22 mi
49Maki & Associates Heating & Air Conditioning564.6★ (27)19 mi
50Elements Heating and Cooling563.2★ (9)10 mi

How we ranked emergency HVAC contractors in Lake Geneva

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 Lake Geneva: questions

Which HVAC contractors in Lake Geneva are open 24/7?

25 on this list post 24/7 hours, including Master Services Inc., H. J. Faust, Inc. Heating and Air Conditioning, American Heating And Air Plus LLC, Black Diamond Plumbing & Mechanical Inc. and Thielmann Heating, Cooling & Plumbing.

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

Master Services Inc. is #1, with a CR Score of 65 out of 100 on emergency weights.

How are emergency HVAC contractors in Lake Geneva 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?

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

Update log for Lake Geneva

  1. October 2026: CR Scores recalculated for 160 hvac contractors serving Lake Geneva.
  2. October 2026: 2 duplicate listings merged.

More emergency and heating and cooling pages