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Emergency HVAC Contractors in Mundelein, IL (2026)

Top 50 of 1,022 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 Mundelein: ABC Plumbing, Sewer, Heating, Cooling & Electric, 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 Mundelein at a glance

Top emergency HVAC contractors in Mundelein at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1ABC Plumbing, Sewer, Heating, Cooling & Electric654.7★ (22,524)Arlington Heights, 9 mi away24/7
2TopTec Heating, Cooling, Plumbing & Electrical644.8★ (2,018)Libertyville, 3 mi away24/7
3Cahill Heating, Cooling, Electric, Plumbing & Sewer645.0★ (1,064)Lake Bluff, 5 mi away24/7
4Legendary Service Inc.635.0★ (292)Mundelein24/7
5AA Service Co.634.9★ (3,150)Northbrook, 11 mi away24/7
6Four Seasons Heating, Air Conditioning, Plumbing, Electric634.7★ (2,787)Buffalo Grove, 8 mi away24/7
7Black Diamond Plumbing & Mechanical Inc.634.9★ (6,580)McHenry, 15 mi away24/7
8Comfort Cavalry Heating & Air635.0★ (234)Mundelein24/7
9Kwik Serv Plumbing, Heating & Cooling634.6★ (697)Mundelein24/7
10Air Kings Heating And Cooling634.9★ (259)Mundelein24/7

Call an emergency HVAC contractor in Mundelein 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 Mundelein, 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 1,022 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 AA Service Co.

    Based in Northbrook, 11 mi away

    63/100CR Score

    Ranked #5 because of its Google rating and trade focus: 4.9★ from 3,150 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 3,150 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    550 Anthony Trail, Northbrook, IL 60062
    View profile for AA Service Co.(847) 729-7889

  14. #14 Green Air Care

    Based in Buffalo Grove, 7 mi away

    62/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.6★ from 1,545 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 1,545 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1566 Barclay Blvd, Buffalo Grove, IL 60089
    View profile for Green Air Care(224) 850-3004

  20. #20 Aire Serv of Palatine

    Based in Palatine, 10 mi away

    62/100CR Score

    Ranked #20 because of its Google rating and trade focus: 4.9★ from 766 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 766 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    473 W Northwest Hwy #1D, Palatine, IL 60067
    View profile for Aire Serv of Palatine(847) 865-9134

Top 50 of 1,022 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 Mundelein, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Mr. Heating and Cooling Inc615.0★ (283)7 mi
27Next Generation Heating & Cooling615.0★ (285)7 mi
28Five Star Heating & Air, Inc.614.9★ (1,082)13 mi
29Gleason Plumbing, Heating and Air614.8★ (420)7 mi
30FloRyte Services615.0★ (340)9 mi
31Intelligent Service: Plumbing, Heating, Cooling & Drain Cleaning614.8★ (1,364)13 mi
3224HR Home Comfort Services614.9★ (1,374)15 mi
33American Weathermakers Inc614.8★ (872)11 mi
34Azrikam The Price Is Right Heating & Air Conditioning HVAC615.0★ (697)13 mi
35Four Seasons Heating, Air Conditioning, Plumbing, & Electric614.8★ (506)9 mi
36On The Mark Heating and Air615.0★ (939)15 mi
37Allied Air Conditioning & Heating Corp.614.9★ (473)11 mi
38ARS / Rescue Rooter614.7★ (4,969)20 mi
39Martin Enterprises Heating & Air Conditioning614.8★ (246)6 mi
40Althoff Home Services614.8★ (1,043)15 mi
41Beck’s Heating and Air Conditioning615.0★ (274)11 mi
42Command Service Center, INC615.0★ (745)16 mi
43Kern Heating & Cooling Co.614.7★ (1,162)14 mi
44Robinson Heating and Cooling Inc614.8★ (357)9 mi
45Carefree Comfort, Inc.605.0★ (288)11 mi
46Comfort Air Control605.0★ (278)11 mi
47Comfort Cavalry Heating & Air604.9★ (1,086)17 mi
48Beckman Bros., Inc604.8★ (119)5 mi
49JNL Climate Control, Inc.604.9★ (820)16 mi
50McHenry Heating & Air, Inc.604.9★ (596)15 mi

How we ranked emergency HVAC contractors in Mundelein

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 Mundelein: questions

Which HVAC contractors in Mundelein are open 24/7?

25 on this list post 24/7 hours, including ABC Plumbing, Sewer, Heating, Cooling & Electric, TopTec Heating, Cooling, Plumbing & Electrical, Cahill Heating, Cooling, Electric, Plumbing & Sewer, Legendary Service Inc. and AA Service Co..

Who is ranked #1 for emergency heating and cooling in Mundelein, IL?

ABC Plumbing, Sewer, Heating, Cooling & Electric is #1, with a CR Score of 65 out of 100 on emergency weights.

How are emergency HVAC contractors in Mundelein 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 Mundelein

  1. October 2026: CR Scores recalculated for 1,022 hvac contractors serving Mundelein.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages