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Emergency HVAC Contractors in Weldon Spring, MO (2026)

Top 50 of 370 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 Weldon Spring: Jerry Kelly Heating & Air Conditioning, 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 Weldon Spring at a glance

Top emergency HVAC contractors in Weldon Spring at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Jerry Kelly Heating & Air Conditioning954.9★ (6,530)Saint Peters, 4 mi away24/7
2Chesterfield Service944.9★ (4,286)Chesterfield, 5 mi away24/7
3Air Comfort Service Inc.925.0★ (1,159)Saint Peters, 6 mi away24/7
4Stay Cool Climate Control925.0★ (1,068)O'Fallon, 6 mi away24/7
5Hoffmann Brothers924.9★ (5,847)St. Louis, 14 mi away24/7
6B & B Heating & Cooling925.0★ (1,348)Saint Charles, 9 mi away24/7
7Hosack Plumbing, Heating & Cooling925.0★ (696)O'Fallon, 7 mi away24/7
8No Problem Heating and Cooling924.8★ (1,113)Saint Peters, 4 mi away24/7
9Comfort Experts, Inc925.0★ (355)Saint Peters, 3 mi away24/7
10Faszold Heating and Cooling914.9★ (873)O'Fallon, 6 mi away24/7

Call an emergency HVAC contractor in Weldon Spring 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 Weldon Spring, 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 370 is on the HVAC contractors page.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  5. #5 Hoffmann Brothers

    Based in St. Louis, 14 mi away

    92/100CR Score

    Ranked #5 because of its Google rating and availability: 4.9★ from 5,847 Google reviews, open 24/7.

    • 4.9★ from 5,847 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2043 Woodland Pkwy #100, St. Louis, MO 63146
    View profile for Hoffmann Brothers(314) 880-7437

  11. #11 Swiss, LLC

    Based in O'Fallon, 7 mi away

    91/100CR Score

    Ranked #11 because of its Google rating and availability: 4.9★ from 924 Google reviews, open 24/7.

    • 4.9★ from 924 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    406 E Wabash St, O'Fallon, MO 63366
    View profile for Swiss, LLC(636) 542-8739

  12. #12 Classic Aire Care

    Based in St. Louis, 16 mi away

    91/100CR Score

    Ranked #12 because of its Google rating and availability: 4.9★ from 4,820 Google reviews, open 24/7.

    • 4.9★ from 4,820 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1276 N Warson Rd, St. Louis, MO 63132
    View profile for Classic Aire Care(314) 988-2501

  13. #13 Classic Aire Care

    Based in Ballwin, 10 mi away

    91/100CR Score

    Ranked #13 because of its Google rating and availability: 5.0★ from 1,014 Google reviews, open 24/7.

    • 5.0★ from 1,014 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    930 Kehrs Mill Rd suite 325-9, Ballwin, MO 63011
    View profile for Classic Aire Care(636) 200-8250

  21. #21 Integrity Aire

    Based in Saint Charles, 9 mi away

    90/100CR Score

    Ranked #21 because of its Google rating and availability: 5.0★ from 288 Google reviews, open 24/7.

    • 5.0★ from 288 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1382 Charlestown Industrial Dr, St Charles, MO 63303
    View profile for Integrity Aire(314) 803-3664

  22. #22 Air Alliance Team

    Based in Saint Peters, 3 mi away

    89/100CR Score

    Ranked #22 because of its Google rating and availability: 4.7★ from 253 Google reviews, open 24/7.

    • 4.7★ from 253 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5233 State Rte N, Cottleville, MO 63304
    View profile for Air Alliance Team(636) 224-1880

  25. #25 Scott-Lee Company

    Based in St. Louis, 20 mi away

    89/100CR Score

    Ranked #25 because of its Google rating and availability: 4.9★ from 2,175 Google reviews, open 24/7.

    • 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

Top 50 of 370 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 Weldon Spring, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Ozark Mechanical895.0★ (160)9 mi
27Martin Jetco Heating & Air Conditioning894.9★ (1,177)18 mi
28Premier, Inc884.9★ (422)13 mi
29B & B Heating & Cooling884.9★ (1,285)21 mi
30Rhymes Heating and Cooling885.0★ (1,430)24 mi
31Missouri Furnace & Air Conditioning884.9★ (275)13 mi
32Level 9 Heating Cooling Plumbing884.9★ (1,254)22 mi
33Reliable Heating & Cooling Inc.884.8★ (112)8 mi
34Stevenson874.9★ (67)7 mi
35Arch Air Services874.9★ (303)16 mi
36Autumn Air Company874.8★ (23)2 mi
37Wyzer Heating and Cooling 🔥❄️👨‍🔧875.0★ (25)4 mi
38Saylors Systems Heating and AC Repair875.0★ (174)17 mi
39SmartHouse Heating and Cooling874.9★ (476)21 mi
40Expectancy Air Heating & Air Conditioning875.0★ (35)8 mi
41Future Aire874.7★ (320)15 mi
42Central Air Heating and Cooling864.8★ (497)20 mi
43Kirkwood Heating & Air Conditioning865.0★ (21)5 mi
44Schraer Heating & Air Conditioning864.8★ (22)4 mi
45Aire Serv of St. Louis864.9★ (221)18 mi
46River Valley Heating and Cooling865.0★ (31)9 mi
47True Blue Home Services864.9★ (17)5 mi
48St. Louis Heating and Air Conditioning864.9★ (487)24 mi
49Vitt Heating & Cooling864.9★ (494)25 mi
50Eureka Heating and Cooling864.8★ (104)15 mi

How we ranked emergency HVAC contractors in Weldon Spring

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. 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
Reputation25%Bayesian-adjusted Google star rating
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2
Review volume10%log10(reviews + 1) against the list maximum
Recency10%Share of reviews from the last 12 months
Availability20%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radius
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)

Emergency HVAC contractors in Weldon Spring: questions

Which HVAC contractors in Weldon Spring are open 24/7?

25 on this list post 24/7 hours, including Jerry Kelly Heating & Air Conditioning, Chesterfield Service, Air Comfort Service Inc., Stay Cool Climate Control and Hoffmann Brothers.

Who is ranked #1 for emergency heating and cooling in Weldon Spring, MO?

Jerry Kelly Heating & Air Conditioning is #1, with a CR Score of 95 out of 100 on emergency weights.

How are emergency HVAC contractors in Weldon Spring ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. 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 Weldon Spring

  1. October 2026: CR Scores recalculated for 370 hvac contractors serving Weldon Spring.

More emergency and heating and cooling pages