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Emergency HVAC Contractors in New London, CT (2026)

Top 50 of 131 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

20 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 New London: Kneeland heating & Cooling 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 New London at a glance

Top emergency HVAC contractors in New London at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Kneeland heating & Cooling LLC644.6★ (169)Groton, 5 mi away24/7
2Connecticut HVAC Services llc624.6★ (107)Guilford, 8 mi away24/7
3DTS Oil & Gas Service & Solutions LLC615.0★ (150)Hebron, 21 mi away24/7
4HVAC Restorations LLC.595.0★ (33)Norwich, 13 mi away24/7
5C&M Heating and Cooling, LLC594.6★ (28)Ledyard, 10 mi away24/7
6Russ Energy585.0★ (8)East Haddam, 6 mi away24/7
7D/E/F Services Group, LTD584.4★ (33)Old Saybrook, 15 mi away24/7
8Best Energy573.8★ (32)Pawcatuck, 14 mi away24/7
9Carnot Heating574.6★ (9)Groton, 10 mi away24/7
10Sprague Heating & Cooling LLC565.0★ (8)Windham, 14 mi away24/7

Call an emergency HVAC contractor in New London 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 New London, 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 131 is on the HVAC contractors page.

  1. Ranked #1 in New London

    #1 Kneeland heating & Cooling LLC

    Based in Groton, 5 mi away

    64/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.6★ from 169 Google reviews, listed on Google as “Heating contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.6★ from 169 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5 Oakwood Dr, Gales Ferry, CT 06335
    View profile for Kneeland heating & Cooling LLC(860) 304-8458

  2. #2 Connecticut HVAC Services llc

    Based in Guilford, 8 mi away

    62/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.6★ from 107 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.6★ from 107 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    153 #103 Boston post rd, East Lyme, CT 06333
    View profile for Connecticut HVAC Services llc(203) 641-4118

  4. #4 HVAC Restorations LLC.

    Based in Norwich, 13 mi away

    59/100CR Score

    Ranked #4 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 33 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    104 Browning Rd, Norwich, CT 06360
    View profile for HVAC Restorations LLC.(860) 912-8483

  6. #6 Russ Energy

    Based in East Haddam, 6 mi away

    58/100CR Score

    Ranked #6 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 8 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Russ Energy(860) 800-4737

  7. #7 D/E/F Services Group, LTD

    Based in Old Saybrook, 15 mi away

    58/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.4★ from 33 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.4★ from 33 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    40 Research Pkwy, Old Saybrook, CT 06475
    View profile for D/E/F Services Group, LTD(860) 376-4896

  8. #8 Best Energy

    Based in Pawcatuck, 14 mi away

    57/100CR Score

    Ranked #8 because of its Google rating and trade focus: 3.8★ from 32 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.8★ from 32 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4 Mechanic St, Pawcatuck, CT 06379
    View profile for Best Energy(860) 599-1920

  9. #9 Carnot Heating

    Based in Groton, 10 mi away

    57/100CR Score

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

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.6★ from 9 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Carnot Heating(860) 917-5879

  12. #12 Valley Heating & Cooling Inc

    Based in Hopkinton, 24 mi away

    56/100CR Score

    Ranked #12 because of its Google rating and trade focus: 3.9★ from 56 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.9★ from 56 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    98 Kenyon Hill Trail, Richmond, RI 02898
    View profile for Valley Heating & Cooling Inc(401) 539-0400

  13. #13 Controlled Mechanicals

    Based in Ledyard, 19 mi away

    55/100CR Score

    Ranked #13 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 8 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Controlled Mechanicals(860) 941-9902

  14. #14 Air Pro Services LLC

    Based in Plainfield, 21 mi away

    54/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 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

  16. #16 Marlborough Heating & AC

    Based in East Haddam, 18 mi away

    54/100CR Score

    Ranked #16 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.2★ from 5 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    26 Randall Rd, Lebanon, CT 06249
    View profile for Marlborough Heating & AC(860) 642-4848

  17. #17 Action Air Inc.

    Based in Springs, 24 mi away

    54/100CR Score

    Ranked #17 because of its Google rating and trade focus: 3.8★ from 16 Google reviews, listed on Google as “HVAC contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.8★ from 16 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    20 16th St, East Hampton, NY 11937
    View profile for Action Air Inc.(631) 965-6289

  18. #18 Air Guarden

    Based in Norwich, 15 mi away

    54/100CR Score

    Ranked #18 because of its Google rating and review volume: 5.0★ from 59 Google reviews.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 59 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1 Hilltop Rd, Norwich, CT 06360
    View profile for Air Guarden(860) 222-1605

  22. #22 Rich's Heating

    Based in New London

    49/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Heating contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 4.2★ from 5 Google reviews
    Address
    New London, CT 06320
    View profile for Rich's Heating(860) 443-4328

  23. #23 DDLC Energy

    Based in New London

    48/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.7★ from 422 Google reviews, listed on Google as “Air conditioning contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.7★ from 422 Google reviews
    Hours
    Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
    Address
    410 Bank St, New London, CT 06320
    View profile for DDLC Energy(866) 395-7220

Top 50 of 131 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 New London, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26South Shore Heating & Cooling Inc474.9★ (564)12 mi
27Bamaca's Roofing LLC474.3★ (6)24 mi
28Densmore Oil Company464.9★ (283)8 mi
29Irie Energy Heating & Cooling, LLC455.0★ (67)In New London
3072 Degrees Air Conditioning & Heating454.2★ (16)19 mi
31Benvenuti Oil Co Inc454.6★ (118)1 mi
32Broad Brook Heating & Cooling Inc454.9★ (175)8 mi
33TNT Heating & Cooling LLC455.0★ (9)18 mi
34Wilcox Energy455.0★ (467)19 mi
35Duncklee Cooling & Heating Inc454.7★ (256)11 mi
36BTW Plumbing, Heating, and Cooling LLC455.0★ (8)19 mi
37Suburban Plumbing & Heating444.0★ (4)In New London
38Northeast Temperature Control435.0★ (3)15 mi
39Renshaw Plumbing, Heating & Cooling434.3★ (48)In New London
40Boss Heating & Cooling Inc434.9★ (280)20 mi
41Millas Heating & Cooling LLC434.9★ (47)5 mi
42E W Leonard Inc434.7★ (6)21 mi
43MDK Mechancial LLC435.0★ (3)18 mi
44Spicer Propane433.6★ (106)1 mi
45Eric Sabo Plumbing Heating & Cooling, LLC.434.9★ (264)22 mi
46Scotti Mechanical Heating and Cooling424.6★ (35)3 mi
47Advanced Heating Oil423.8★ (46)1 mi
48Foley Furnace Inc424.5★ (4)22 mi
49Benedetto Heating & AC LLC414.9★ (74)16 mi
50Bartol Heating and Cooling414.2★ (15)In New London

How we ranked emergency HVAC contractors in New London

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 New London: questions

Which HVAC contractors in New London are open 24/7?

20 on this list post 24/7 hours, including Kneeland heating & Cooling LLC, Connecticut HVAC Services llc, DTS Oil & Gas Service & Solutions LLC, HVAC Restorations LLC. and C&M Heating and Cooling, LLC.

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

Kneeland heating & Cooling LLC is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency HVAC contractors in New London 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 New London

  1. October 2026: CR Scores recalculated for 131 hvac contractors serving New London.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages