Top 50 of 781 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 Island Lake: Black Diamond Plumbing & Mechanical Inc., 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 | Black Diamond Plumbing & Mechanical Inc. | 65 | 4.9★ (6,580) | McHenry, 6 mi away | 24/7 |
| 2 | ABC Plumbing, Sewer, Heating, Cooling & Electric | 64 | 4.7★ (22,524) | Arlington Heights, 14 mi away | 24/7 |
| 3 | 24HR Home Comfort Services | 63 | 4.9★ (1,374) | Lake in the Hills, 7 mi away | 24/7 |
| 4 | Duane Blanton Plumbing, Sewer, Heating & Cooling | 63 | 4.7★ (2,290) | Round Lake, 8 mi away | 24/7 |
| 5 | Althoff Home Services | 63 | 4.8★ (1,043) | Crystal Lake, 7 mi away | 24/7 |
| 6 | Lifeline Plumbing, Heating & Cooling | 63 | 4.9★ (3,222) | Elgin, 13 mi away | 24/7 |
| 7 | McHenry Heating & Air, Inc. | 63 | 4.9★ (596) | McHenry, 5 mi away | 24/7 |
| 8 | Gleason Plumbing, Heating and Air | 62 | 4.8★ (420) | Wauconda, 3 mi away | 24/7 |
| 9 | Rellaire Smart Home Systems | 62 | 4.9★ (472) | Crystal Lake, 5 mi away | 24/7 |
| 10 | WeatherWise Heating & AC repair | 62 | 4.8★ (744) | Crystal Lake, 6 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.
#1Black Diamond Plumbing & Mechanical Inc.
Open 24/7 · 4.9 from 6,580 Google reviews
#2ABC Plumbing, Sewer, Heating, Cooling & Electric
Open 24/7 · 4.7 from 22,524 Google reviews
Open 24/7 · 4.9 from 1,374 Google reviews
#4Duane Blanton Plumbing, Sewer, Heating & Cooling
Open 24/7 · 4.7 from 2,290 Google reviews
Open 24/7 · 4.8 from 1,043 Google reviews
#6Lifeline Plumbing, Heating & Cooling
Open 24/7 · 4.9 from 3,222 Google reviews
Open 24/7 · 4.9 from 596 Google reviews
#8Gleason Plumbing, Heating and Air
Open 24/7 · 4.8 from 420 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 781 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: 4.9★ from 6,580 Google reviews, listed on Google as “HVAC contractor”.
Based in Arlington Heights, 14 mi away
Ranked #2 because of its Google rating and review volume: 4.7★ from 22,524 Google reviews.
Based in Lake in the Hills, 7 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 1,374 Google reviews, listed on Google as “HVAC contractor”.
Based in Round Lake, 8 mi away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 2,290 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 7 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 1,043 Google reviews, listed on Google as “HVAC contractor”.
Based in Elgin, 13 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 3,222 Google reviews, listed on Google as “HVAC contractor”.
Based in McHenry, 5 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 596 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Wauconda, 3 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 420 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 5 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 472 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 6 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 744 Google reviews, listed on Google as “Furnace repair service”.
Based in Crystal Lake, 8 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 571 Google reviews, listed on Google as “HVAC contractor”.
Based in Grayslake, 9 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 986 Google reviews, listed on Google as “HVAC contractor”.
Based in Libertyville, 13 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 2,018 Google reviews, listed on Google as “HVAC contractor”.
Based in Fox Lake, 5 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 269 Google reviews, listed on Google as “HVAC contractor”.
Based in Cary, 6 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 338 Google reviews, listed on Google as “HVAC contractor”.
Based in Buffalo Grove, 14 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 2,787 Google reviews, listed on Google as “HVAC contractor”.
Based in Woodstock, 13 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 1,222 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Zurich, 8 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 320 Google reviews, listed on Google as “HVAC contractor”.
Based in Huntley, 12 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 820 Google reviews, listed on Google as “HVAC contractor”.
Based in Mundelein, 8 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 292 Google reviews, listed on Google as “HVAC contractor”.
Based in Fox Lake, 8 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 371 Google reviews, listed on Google as “HVAC contractor”.
Based in Rolling Meadows, 15 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 1,104 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Bluff, 15 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 1,064 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrington, 8 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 506 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 8 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 460 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 |