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Emergency HVAC Contractors in Saint John, IN (2026)

Top 50 of 392 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 Saint John: Summers Plumbing Heating & Cooling, 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 Saint John at a glance

Top emergency HVAC contractors in Saint John at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Summers Plumbing Heating & Cooling674.9★ (4,666)Crown Point, 6 mi away24/7
2Merts Heating & Air Conditioning644.8★ (1,449)Steger, 8 mi away24/7
3AAA Services, Inc. - Heating, Air Conditioning & Plumbing644.9★ (486)Merrillville, 6 mi away24/7
4Comfort Aire Inc634.8★ (508)Merrillville, 6 mi away24/7
5King Heating, Cooling & Plumbing634.7★ (3,996)Oak Forest, 17 mi away24/7
6True Quality HVAC635.0★ (368)Gary, 8 mi away24/7
7Four Seasons Heating, Air Conditioning, Plumbing, & Electric634.8★ (3,722)Crestwood, 19 mi away24/7
8EcoEdge Systems Heating & Cooling634.9★ (486)Merrillville, 9 mi away24/7
9All American AC & Heating Repair634.9★ (275)Crown Point, 7 mi away24/7
10Four Seasons Heating, Air Conditioning, Plumbing, & Electric634.8★ (516)Hobart, 9 mi away24/7

Call an emergency HVAC contractor in Saint John 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 Saint John, 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 392 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.

  4. #4 Comfort Aire Inc

    Based in Merrillville, 6 mi away

    63/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.8★ from 508 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 508 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8269 Buchanan St, Merrillville, IN 46410
    View profile for Comfort Aire Inc(219) 306-2348

  11. #11 Home Comfort Experts

    Based in Valparaiso, 23 mi away

    62/100CR Score

    Ranked #11 because of its Google rating and trade focus: 4.9★ from 4,299 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 4,299 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3505 Redbow Dr, Valparaiso, IN 46383
    View profile for Home Comfort Experts(219) 224-6602

  19. #19 All-Star Service

    Based in Valparaiso, 16 mi away

    61/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.8★ from 526 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 526 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    519 W US Hwy 30, Valparaiso, IN 46385
    View profile for All-Star Service(219) 464-4919

Top 50 of 392 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 Saint John, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Climate Control Systems604.9★ (430)20 mi
27Four Seasons Mechanical604.8★ (73)8 mi
284 Brothers Sewer and Plumbing Service604.6★ (166)11 mi
29Art Miller Plumbing & Heating604.9★ (35)5 mi
30Nikki's Heating & Cooling605.0★ (30)5 mi
31Doornbos Heating & Air Conditioning604.8★ (600)22 mi
32J&J Heating Inc.605.0★ (52)9 mi
33Morgan Mechanical Heating and Air, LLC604.8★ (41)6 mi
34King Heating, Cooling & Plumbing604.8★ (783)23 mi
35Burris & Sons Heating, Cooling & Plumbing594.8★ (500)21 mi
36Mountain Top Heating Air & Appliance Repair Inc.repair594.6★ (117)11 mi
37Climate Master Mechanical Contractors, Inc. DBA Doornbos Heating & Air Conditioning594.9★ (282)19 mi
38TemperaturePro Heating, Cooling & Indoor Air Quality594.8★ (440)21 mi
39Comfort Zone Service595.0★ (296)21 mi
40Elico Heating & Cooling594.9★ (346)21 mi
41Integrity Heating & Cooling594.5★ (816)21 mi
42J.J.R. Heating & Cooling Inc595.0★ (408)24 mi
43Magtek Mechanical Heating & Cooling594.9★ (539)24 mi
44Polar Heating & AC594.6★ (899)24 mi
45Cold Air HVAC LLC594.4★ (35)5 mi
46Gray's Total Green Energy Solutions LLC594.4★ (127)11 mi
47One Hour Heating & Air Conditioning of Hazel Crest594.8★ (100)14 mi
48Porterhouse Heating & Cooling594.8★ (201)18 mi
49Amber Heating & Air Conditioning DBA Doornbos Heating & Air Conditioning584.8★ (269)22 mi
50Crown Wheele HVAC584.8★ (259)21 mi

How we ranked emergency HVAC contractors in Saint John

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 Saint John: questions

Which HVAC contractors in Saint John are open 24/7?

25 on this list post 24/7 hours, including Summers Plumbing Heating & Cooling, Merts Heating & Air Conditioning, AAA Services, Inc. - Heating, Air Conditioning & Plumbing, Comfort Aire Inc and King Heating, Cooling & Plumbing.

Who is ranked #1 for emergency heating and cooling in Saint John, IN?

Summers Plumbing Heating & Cooling is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Saint John 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 Saint John

  1. October 2026: CR Scores recalculated for 392 hvac contractors serving Saint John.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages