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Emergency HVAC Contractors in Newmarket, ON (2026)

Top 50 of 636 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 Newmarket: Summers and Smith Cooling & Heating Limited, 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 Newmarket at a glance

Top emergency HVAC contractors in Newmarket at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Summers and Smith Cooling & Heating Limited644.9★ (1,559)Aurora, 6 km away24/7
2Reliance Heating, Air Conditioning & Plumbing644.9★ (10,870)Richmond Hill, 24 km away24/7
3Enercare634.9★ (9,609)Vaughan, 30 km away24/7
4Black Forest624.8★ (532)East Gwillimbury, 5 km away24/7
5Infiniti Air Conditioning & Heating624.9★ (181)Newmarket24/7
6Reliance Heating, Air Conditioning & Plumbing614.7★ (9,158)North York, 33 km away24/7
7Enercare614.8★ (11,186)North York, 37 km away24/7
8Go Lime614.8★ (6,512)North York, 33 km away24/7
9Smile HVAC615.0★ (1,314)Vaughan, 26 km away24/7
10Reliance Yanch Heating, Air Conditioning & Plumbing614.8★ (5,937)Barrie, 35 km away24/7

Call an emergency HVAC contractor in Newmarket 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 Newmarket, 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 636 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.

  3. #3 Enercare

    Based in Vaughan, 30 km away

    63/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.9★ from 9,609 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 9,609 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    261 Trowers Rd, Vaughan, ON L4L 5Z8
    View profile for Enercare(905) 266-0219

  4. #4 Black Forest

    Based in East Gwillimbury, 5 km away

    62/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.8★ from 532 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 532 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    16 Mt Albert Rd, East Gwillimbury, ON L9N 1K4
    View profile for Black Forest(905) 252-9994

  7. #7 Enercare

    Based in North York, 37 km away

    61/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.8★ from 11,186 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 11,186 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    37 Dufflaw Rd, North York, ON M6A 2W2
    View profile for Enercare(416) 640-1206

  8. #8 Go Lime

    Based in North York, 33 km away

    61/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.8★ from 6,512 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 6,512 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2225 Sheppard Ave E, North York, ON M2J 5C2
    View profile for Go Lime(877) 747-8292

  9. #9 Smile HVAC

    Based in Vaughan, 26 km away

    61/100CR Score

    Ranked #9 because of its Google rating and trade focus: 5.0★ from 1,314 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 1,314 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8540 Keele St Unit 41, Vaughan, ON L4K 2A6
    View profile for Smile HVAC(437) 777-4555

  12. #12 LG Home Comfort

    Based in Vaughan, 26 km away

    60/100CR Score

    Ranked #12 because of its Google rating and trade focus: 4.6★ from 2,421 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 2,421 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    301 Bradwick Dr, Vaughan, ON L4K 1K5
    View profile for LG Home Comfort(866) 438-5442

  17. #17 Affordable Comfort

    Based in Barrie, 35 km away

    60/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.9★ from 2,540 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 2,540 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    92 Commerce Park Dr Unit 8, Barrie, ON L4N 8W8
    View profile for Affordable Comfort(705) 503-4328

  18. #18 Blu Hvac Inc

    Based in Newmarket

    60/100CR Score

    Ranked #18 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 32 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    729 Shanahan Blvd, Newmarket, ON L3X 1P8
    View profile for Blu Hvac Inc(289) 552-6407

  19. #19 ICare Home Comfort

    Based in Markham, 27 km away

    60/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.9★ from 836 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 836 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1001 Denison St Unit 1-2, Markham, ON L3R 2Z6
    View profile for ICare Home Comfort(905) 399-9888

  20. #20 Sabbouh Mechanical

    Based in Newmarket

    60/100CR Score

    Ranked #20 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Heating contractor”.

    • 5.0★ from 32 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    Davis and, Main St S, Newmarket, ON L9V 2Z5
    View profile for Sabbouh Mechanical(905) 252-6106

  25. #25 HVAC Trust

    Based in Richmond Hill, 24 km away

    60/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.9★ from 465 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 465 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    330 Hwy 7 Unit#305, Richmond Hill, ON L4B 3P8
    View profile for HVAC Trust(855) 916-0615

Top 50 of 636 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 Newmarket, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Heat and Cool Brothers Inc.605.0★ (162)18 km
27Energy Clean Heating and Air Systems594.9★ (294)22 km
28Climax Heating & Air Conditioning - Condo HVAC Service594.9★ (529)28 km
29Constant Home Comfort594.8★ (583)27 km
30Martino HVAC594.7★ (631)26 km
31Enercare594.8★ (1,154)33 km
32Enercare594.7★ (2,051)35 km
33One Heating & Cooling595.0★ (16)In Newmarket
34Aire One Heating & Cooling594.8★ (480)26 km
35Service Express HVAC594.9★ (384)27 km
36Superior Care Home Services Inc.595.0★ (266)26 km
37The Ontario HVAC Group594.9★ (140)19 km
38Eco Star Home Services Co.594.7★ (490)25 km
39Enercare594.8★ (2,085)39 km
40Hargrave Heating & Air Conditioning594.9★ (366)27 km
41DC Comfort Air595.0★ (145)23 km
42Home Trade Standards - Condo HVAC Specialists595.0★ (464)33 km
43Royal Air Solutions595.0★ (271)28 km
44BreezeCome Home Service/Quality Breeze 清风到家 服务到家594.8★ (481)29 km
45Constant Home Comfort594.6★ (301)21 km
46Fox Services595.0★ (22)6 km
47Airsense Mechanical594.9★ (64)15 km
48Enercare584.7★ (1,470)37 km
49PRO CLIMATE584.9★ (242)27 km
50Climate Air Heating & Air Conditioning584.8★ (841)36 km

How we ranked emergency HVAC contractors in Newmarket

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 Newmarket: questions

Which HVAC contractors in Newmarket are open 24/7?

25 on this list post 24/7 hours, including Summers and Smith Cooling & Heating Limited, Reliance Heating, Air Conditioning & Plumbing, Enercare, Black Forest and Infiniti Air Conditioning & Heating.

Who is ranked #1 for emergency heating and cooling in Newmarket, ON?

Summers and Smith Cooling & Heating Limited is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency HVAC contractors in Newmarket 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 Newmarket

  1. October 2026: CR Scores recalculated for 636 hvac contractors serving Newmarket.

More emergency and heating and cooling pages