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Emergency HVAC Contractors in Waterloo, IL (2026)

Top 50 of 231 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 Waterloo: Classic Aire Care, 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 Waterloo at a glance

Top emergency HVAC contractors in Waterloo at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Classic Aire Care655.0★ (1,400)Arnold, 14 mi away24/7
2BELOMAN644.9★ (1,500)Belleville, 14 mi away24/7
3Rhymes Heating and Cooling645.0★ (1,430)St. Louis, 16 mi away24/7
4Scott-Lee Company644.9★ (2,175)St. Louis, 19 mi away24/7
5Academy Air Heating, Cooling, Plumbing and Electric634.8★ (875)Barnhart, 12 mi away24/7
6Dole Heating & Air Conditioning634.9★ (1,401)St. Louis, 19 mi away24/7
7Perfect Air634.9★ (807)Festus, 15 mi away24/7
8Classic Aire Care635.0★ (1,160)Fairview Heights, 21 mi away24/7
9Martin Jetco Heating & Air Conditioning624.9★ (1,177)Eureka, 22 mi away24/7
10Lunk's Heating & Cooling625.0★ (29)Waterloo24/7

Call an emergency HVAC contractor in Waterloo 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 Waterloo, 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 231 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 Waterloo

    #1 Classic Aire Care

    Based in Arnold, 14 mi away

    65/100CR Score

    Ranked #1 because of its Google rating and trade focus: 5.0★ from 1,400 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 1,400 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2104 Tenbrook Rd, Arnold, MO 63010
    View profile for Classic Aire Care(636) 220-5859

  2. #2 BELOMAN

    Based in Belleville, 14 mi away

    64/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.9★ from 1,500 Google reviews, listed on Google as “Air conditioning repair service”.

    • 4.9★ from 1,500 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5909 Cool Sports Rd, Belleville, IL 62223
    View profile for BELOMAN(618) 235-6626

  4. #4 Scott-Lee Company

    Based in St. Louis, 19 mi away

    64/100CR Score

    Ranked #4 because of its Google rating and review volume: 4.9★ from 2,175 Google reviews.

    • 4.9★ from 2,175 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    11010 Gravois Industrial Ct, St. Louis, MO 63128
    View profile for Scott-Lee Company(314) 828-8505

  7. #7 Perfect Air

    Based in Festus, 15 mi away

    63/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.9★ from 807 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 807 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    503 Warne St, Festus, MO 63028
    View profile for Perfect Air(636) 937-2578

  8. #8 Classic Aire Care

    Based in Fairview Heights, 21 mi away

    63/100CR Score

    Ranked #8 because of its Google rating and trade focus: 5.0★ from 1,160 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 1,160 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    13 Executive Dr Suite 15, Fairview Heights, IL 62208
    View profile for Classic Aire Care(618) 213-2690

  25. #25 Weis Comfort Systems

    Based in St. Louis, 18 mi away

    59/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.8★ from 152 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 152 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    9900 Gravois Rd Unit 2, St. Louis, MO 63123
    View profile for Weis Comfort Systems(636) 223-4697

Top 50 of 231 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 Waterloo, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26The Heating & Cooling Guy located in Mascoutah Illinois. Service call $59.594.9★ (169)22 mi
27Hosack Plumbing, Heating & Cooling594.9★ (153)23 mi
28Kirkwood Heating & Air Conditioning584.7★ (135)20 mi
29Climate Bullies Heating and Cooling584.9★ (36)15 mi
30Inman Heating & Cooling584.1★ (14)8 mi
31Glosemeyer Mechanical584.2★ (42)12 mi
32Harster Heating & Air Conditioning584.5★ (77)18 mi
33Belleville Services584.7★ (49)17 mi
34Rathgeber Heating Co585.0★ (18)13 mi
35Froggy's Heating and Air, LLC585.0★ (20)14 mi
36Marciante Diversified Heating and Cooling574.6★ (41)16 mi
37Honor Heating, Air and Plumbing Inc.574.9★ (40)18 mi
38Hudson's Heating & Cooling575.0★ (12)12 mi
39Parkway heating & air574.2★ (36)15 mi
40American Heating & Air Conditioning575.0★ (40)21 mi
41Polar Plumbing, Heating & Air Conditioning575.0★ (197)17 mi
42Hely Heating and Air Conditioning Co.574.7★ (41)20 mi
43McQuerry's 24 Hour Heating & Air Conditioning564.9★ (35)21 mi
44Niksic Air Conditioning & Heating564.6★ (22)18 mi
45DC Heating & Cooling565.0★ (29)22 mi
46Air Pro Heating & Cooling565.0★ (5)12 mi
47Integrated Facility Services, Inc.564.4★ (43)22 mi
48JBR Heating and Cooling555.0★ (20)23 mi
49St Louis Heating and Cooling554.7★ (15)21 mi
50Pierce Heating and Air555.0★ (10)20 mi

How we ranked emergency HVAC contractors in Waterloo

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 Waterloo: questions

Which HVAC contractors in Waterloo are open 24/7?

25 on this list post 24/7 hours, including Classic Aire Care, BELOMAN, Rhymes Heating and Cooling, Scott-Lee Company and Academy Air Heating, Cooling, Plumbing and Electric.

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

Classic Aire Care is #1, with a CR Score of 65 out of 100 on emergency weights.

How are emergency HVAC contractors in Waterloo 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 Waterloo

  1. October 2026: CR Scores recalculated for 231 hvac contractors serving Waterloo.
  2. October 2026: 1 duplicate listing merged.

More emergency and heating and cooling pages