Top 50 of 999 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.
#1 for emergency heating and cooling in Markham: King Heating, Cooling & Plumbing, open 24/7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
| Rank | Business | CR Score | Google rating | Based in | Hours |
|---|---|---|---|---|---|
| 1 | King Heating, Cooling & Plumbing | 65 | 4.7★ (3,996) | Oak Forest, 2 mi away | 24/7 |
| 2 | Four Seasons Heating, Air Conditioning, Plumbing, & Electric | 65 | 4.8★ (3,722) | Crestwood, 4 mi away | 24/7 |
| 3 | Four Seasons Heating, Air Conditioning, Plumbing, & Electric | 65 | 4.7★ (27,709) | Chicago, 12 mi away | 24/7 |
| 4 | Four Seasons Heating, Air Conditioning, Plumbing, & Electric | 63 | 4.7★ (4,200) | Bridgeview, 10 mi away | 24/7 |
| 5 | Precision Heating and Cooling | 63 | 4.9★ (842) | Alsip, 7 mi away | 24/7 |
| 6 | Air Source 1 Heating & Air Conditioning | 62 | 5.0★ (664) | Mokena, 8 mi away | 24/7 |
| 7 | Merts Heating & Air Conditioning | 62 | 4.8★ (1,449) | Steger, 9 mi away | 24/7 |
| 8 | TR Miller Heating, Cooling, Plumbing and Electrical | 62 | 4.9★ (2,423) | Tinley Park, 14 mi away | 24/7 |
| 9 | Doornbos Heating & Air Conditioning | 62 | 4.8★ (600) | Alsip, 7 mi away | 24/7 |
| 10 | Allegiance Heating & Cooling | 62 | 4.9★ (440) | Mokena, 7 mi away | 24/7 |
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.
#1King Heating, Cooling & Plumbing
Open 24/7 · 4.7 from 3,996 Google reviews
#2Four Seasons Heating, Air Conditioning, Plumbing, & Electric
Open 24/7 · 4.8 from 3,722 Google reviews
#3Four Seasons Heating, Air Conditioning, Plumbing, & Electric
Open 24/7 · 4.7 from 27,709 Google reviews
#4Four Seasons Heating, Air Conditioning, Plumbing, & Electric
Open 24/7 · 4.7 from 4,200 Google reviews
#5Precision Heating and Cooling
Open 24/7 · 4.9 from 842 Google reviews
#6Air Source 1 Heating & Air Conditioning
Open 24/7 · 5.0 from 664 Google reviews
#7Merts Heating & Air Conditioning
Open 24/7 · 4.8 from 1,449 Google reviews
#8TR Miller Heating, Cooling, Plumbing and Electrical
Open 24/7 · 4.9 from 2,423 Google reviews
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 999 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.
Ranked #1 because of its Google rating and trade focus: 4.7★ from 3,996 Google reviews, listed on Google as “HVAC contractor”.
Based in Crestwood, 4 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 3,722 Google reviews, listed on Google as “HVAC contractor”.
Based in Chicago, 12 mi away
Ranked #3 because of its Google rating and review volume: 4.7★ from 27,709 Google reviews.
Based in Bridgeview, 10 mi away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 4,200 Google reviews, listed on Google as “HVAC contractor”.
Based in Alsip, 7 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 842 Google reviews, listed on Google as “Heating contractor”.
Based in Mokena, 8 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 664 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Steger, 9 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 1,449 Google reviews, listed on Google as “Furnace repair service”.
Based in Tinley Park, 14 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 2,423 Google reviews, listed on Google as “HVAC contractor”.
Based in Alsip, 7 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 600 Google reviews, listed on Google as “HVAC contractor”.
Based in Mokena, 7 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 440 Google reviews, listed on Google as “HVAC contractor”.
Based in Plainfield, 9 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 408 Google reviews, listed on Google as “HVAC contractor”.
Based in Mokena, 8 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 428 Google reviews, listed on Google as “Furnace repair service”.
Based in Oak Lawn, 9 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 783 Google reviews, listed on Google as “HVAC contractor”.
Based in Frankfort, 11 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 1,060 Google reviews, listed on Google as “HVAC contractor”.
Based in Orland Park, 9 mi away
Ranked #15 because of its Google rating and trade focus: 4.6★ from 899 Google reviews, listed on Google as “HVAC contractor”.
Based in Crown Point, 21 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 4,666 Google reviews, listed on Google as “HVAC contractor”.
Based in Mokena, 8 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 282 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Mokena, 9 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 296 Google reviews, listed on Google as “HVAC contractor”.
Based in Alsip, 7 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 269 Google reviews, listed on Google as “HVAC contractor”.
Based in Hazel Crest, 2 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 100 Google reviews, listed on Google as “HVAC contractor”.
Based in Mokena, 9 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 440 Google reviews, listed on Google as “HVAC contractor”.
Based in Tinley Park, 6 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ from 201 Google reviews, listed on Google as “HVAC contractor”.
Based in Frankfort, 11 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 430 Google reviews, listed on Google as “HVAC contractor”.
Based in Countryside, 6 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 109 Google reviews, listed on Google as “HVAC contractor”.
Based in Mokena, 9 mi away
Ranked #25 because of its Google rating and trade focus: 4.5★ from 816 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.
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.
| Factor | Weight | Computed from |
|---|---|---|
| Reputation | 15% | Google star rating, adjusted for how many reviews back it |
| Credentials | 15% | Active state license, bond and workers’ comp on file |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list |
| Recency | 5% | Share of reviews from the last 12 months |
| Availability | 15% | Weekly open hours, Saturday, Sunday, 24/7 or same-day |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) |
| Proximity | 5% | Based in the city scores highest, less the farther away it is |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are |