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Emergency HVAC Contractors in Willimantic, CT (2026)

Top 50 of 241 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 Willimantic: CNM Heating Cooling Piping LLC, 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 Willimantic at a glance

Top emergency HVAC contractors in Willimantic at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1CNM Heating Cooling Piping LLC635.0★ (186)Storrs, 4 mi away24/7
2DTS Oil & Gas Service & Solutions LLC625.0★ (150)Hebron, 7 mi away24/7
3Degree Heating and Cooling624.8★ (1,302)Glastonbury, 20 mi away24/7
4Corbett HVAC Services LLC624.4★ (80)Willimantic24/7
5Absolute Air Services, LLC614.9★ (1,027)Portland, 22 mi away24/7
6SM Mechanical Services LLC614.8★ (618)Glastonbury, 21 mi away24/7
7Wyman Energy Services Inc.594.8★ (172)Manchester, 18 mi away24/7
8Crown Point Heating And Cooling585.0★ (17)Glastonbury, 7 mi away24/7
9HVAC Restorations LLC.585.0★ (33)Norwich, 12 mi away24/7
10Limitless Mechanical Services585.0★ (64)Manchester, 17 mi away24/7

Call an emergency HVAC contractor in Willimantic 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 Willimantic, 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 241 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.

  15. #15 Taylor Energy

    Based in Ellington, 23 mi away

    57/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.4★ from 138 Google reviews, listed on Google as “HVAC contractor”.

    • 4.4★ from 138 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    152 Broad Brook Rd, Broad Brook, CT 06016
    View profile for Taylor Energy(860) 623-3308

  18. #18 Air Pro Services LLC

    Based in Plainfield, 9 mi away

    56/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 9 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    54 Woodchuck Hill Rd, Canterbury, CT 06331
    View profile for Air Pro Services LLC(860) 334-3031

  24. #24 Clark's Heating

    Based in Middletown, 25 mi away

    56/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.8★ from 63 Google reviews, listed on Google as “Heating contractor”.

    • 4.8★ from 63 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    16 Alsop Ave, Middletown, CT 06457
    View profile for Clark's Heating(860) 346-1137

Top 50 of 241 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 Willimantic, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26KSB Electric565.0★ (245)12 mi
27N&T Heating Cooling and Ventilation LLC565.0★ (24)21 mi
28Apex Mechanical Services553.3★ (7)10 mi
29Carnot Heating554.6★ (9)16 mi
30Cool Spaces Services555.0★ (15)21 mi
31Controlled Mechanicals545.0★ (8)18 mi
32Cundiff HVAC544.4★ (23)22 mi
33Preferred Propane543.6★ (14)17 mi
34SLS HEATING LLC- 24 HOUR EMERGENCY SERVICE543.4★ (62)20 mi
35Russ Energy545.0★ (8)19 mi
36Bobby's Burner Service544.9★ (13)23 mi
37Rapid Service LLC544.4★ (74)6 mi
38Air Guarden535.0★ (59)11 mi
39Wittig Mechanical, Llc533.7★ (9)19 mi
40Action Air Systems, Inc.533.2★ (9)19 mi
41Air Control Mechanical LLC535.0★ (4)18 mi
42Reliable Mechanical Contractors533.0★ (10)20 mi
43Bystrek's Oil Company, LLC523.8★ (10)25 mi
44Tucker Mechanical524.4★ (7)25 mi
45Rainville Plumbing & Heating515.0★ (4)13 mi
46Callahan's Plumbing & Heating504.7★ (24)25 mi
47Ugo DiGrazia Air Conditioning and Heating, Inc.504.9★ (359)24 mi
48David Robbin Plumbing & Heating505.0★ (7)21 mi
49Petro Home Services504.1★ (119)22 mi
50Nutmeg Mechanical Services Inc.494.7★ (142)17 mi

How we ranked emergency HVAC contractors in Willimantic

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 Willimantic: questions

Which HVAC contractors in Willimantic are open 24/7?

25 on this list post 24/7 hours, including CNM Heating Cooling Piping LLC, DTS Oil & Gas Service & Solutions LLC, Degree Heating and Cooling, Corbett HVAC Services LLC and Absolute Air Services, LLC.

Who is ranked #1 for emergency heating and cooling in Willimantic, CT?

CNM Heating Cooling Piping LLC is #1, with a CR Score of 63 out of 100 on emergency weights.

How are emergency HVAC contractors in Willimantic 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 Willimantic

  1. October 2026: CR Scores recalculated for 241 hvac contractors serving Willimantic.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages