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Emergency HVAC Contractors in Grayslake, IL (2026)

Top 50 of 710 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 Grayslake: Precision Today Plumbing Heating Cooling Electrical (Miller's Area Heating), 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 Grayslake at a glance

Top emergency HVAC contractors in Grayslake at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Precision Today Plumbing Heating Cooling Electrical (Miller's Area Heating)644.8★ (986)Grayslake24/7
2ABC Plumbing, Sewer, Heating, Cooling & Electric644.7★ (22,524)Arlington Heights, 15 mi away24/7
3Duane Blanton Plumbing, Sewer, Heating & Cooling644.7★ (2,290)Round Lake, 3 mi away24/7
4Black Diamond Plumbing & Mechanical Inc.644.9★ (6,580)McHenry, 13 mi away24/7
5TopTec Heating, Cooling, Plumbing & Electrical634.8★ (2,018)Libertyville, 6 mi away24/7
6Cahill Heating, Cooling, Electric, Plumbing & Sewer635.0★ (1,064)Lake Bluff, 8 mi away24/7
7Allied Air Conditioning & Heating Corp.635.0★ (428)Libertyville, 5 mi away24/7
8Command Service Center, INC625.0★ (745)Antioch, 10 mi away24/7
9Comfort Cavalry Heating & Air624.9★ (1,086)Antioch, 11 mi away24/7
10Herchenbach Mechanical Inc.624.9★ (576)Gurnee, 8 mi away24/7

Call an emergency HVAC contractor in Grayslake 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 Grayslake, 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 710 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.

  11. #11 AA Service Co.

    Based in Northbrook, 17 mi away

    62/100CR Score

    Ranked #11 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

  13. #13 Beckman Bros., Inc

    Based in Grayslake

    62/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.8★ from 119 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 119 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1072 S Corporate Cir, Grayslake, IL 60030
    View profile for Beckman Bros., Inc(847) 223-7870

  24. #24 Triple Tech Services

    Based in Gurnee, 6 mi away

    61/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.8★ from 232 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 232 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1800 Nations Dr Suite 177, Gurnee, IL 60031
    View profile for Triple Tech Services(847) 263-1908

Top 50 of 710 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 Grayslake, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Green Air Care614.6★ (1,545)13 mi
27Lake County Mechanical614.9★ (374)10 mi
28Lifeline Plumbing, Heating & Cooling614.9★ (3,222)21 mi
29American Star Total Home Comfort615.0★ (1,104)18 mi
30McHenry Heating & Air, Inc.614.9★ (596)13 mi
31Chicagoland Heating and Cooling Inc.614.9★ (122)5 mi
32STVU Inc615.0★ (79)4 mi
33The Pure Air Experts615.0★ (108)5 mi
34American Comfort Solution605.0★ (235)10 mi
35Aire Serv of Palatine604.9★ (766)15 mi
36Althoff Home Services604.8★ (1,043)16 mi
37South Shore Heating & Air Conditioning Inc.605.0★ (104)6 mi
38J M Heating & Cooling604.8★ (45)In Grayslake
39Active Heating & Cooling604.9★ (74)4 mi
40Mr. Heating and Cooling Inc605.0★ (283)12 mi
41Rellaire Smart Home Systems604.9★ (472)14 mi
42Astera Heating, Cooling and Appliance repair604.9★ (1,120)18 mi
43Five Star Heating & Air, Inc.604.9★ (1,082)18 mi
44Four Seasons Heating, Air Conditioning, Plumbing, & Electric604.8★ (506)13 mi
45SPG Plumbing Northbrook604.9★ (861)17 mi
46WeatherWise Heating & AC repair604.8★ (744)15 mi
47Air Blue Heating and Cooling604.8★ (684)15 mi
48Duane Blanton Plumbing, Sewer, Heating & Cooling604.9★ (105)7 mi
49Next Generation Heating & Cooling605.0★ (285)13 mi
50SPG Plumbing, Drain and Sewer Gurnee605.0★ (103)8 mi

How we ranked emergency HVAC contractors in Grayslake

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 Grayslake: questions

Which HVAC contractors in Grayslake are open 24/7?

25 on this list post 24/7 hours, including Precision Today Plumbing Heating Cooling Electrical (Miller's Area Heating), ABC Plumbing, Sewer, Heating, Cooling & Electric, Duane Blanton Plumbing, Sewer, Heating & Cooling, Black Diamond Plumbing & Mechanical Inc. and TopTec Heating, Cooling, Plumbing & Electrical.

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

Precision Today Plumbing Heating Cooling Electrical (Miller's Area Heating) is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency HVAC contractors in Grayslake 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 Grayslake

  1. October 2026: CR Scores recalculated for 710 hvac contractors serving Grayslake.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages