1,139 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Fairfield: ABC Plumbing, Sewer, Heating, Cooling & Electric, CR Score 93/100; 4.7★ from 22,524 Google reviews; open 24/7.
Best for emergencies (open 24/7): Black Diamond Plumbing & Mechanical Inc., posts 24/7 hours; ranked #2 of 1,139.
Most-reviewed: Precision Today Plumbing Heating Cooling Electrical, 7,723 Google reviews at 4.8★, the most of 1,139 ranked after ABC Plumbing, Sewer, Heating, Cooling & Electric; ranked #44.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,139 Fairfield HVAC contractors are ranked here by CR Score, from 8 published factors. 500 are open 24/7, 860 open Saturdays and 707 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,139 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | ABC Plumbing, Sewer, Heating, Cooling & Electric | 93 | 4.7★ (22,524) | Arlington Heights, 7 mi away | 24/7 | Overall |
| 2 | Black Diamond Plumbing & Mechanical Inc. | 91 | 4.9★ (6,580) | McHenry, 14 mi away | 24/7 | Emergencies |
| 3 | Aaron & Trecker Heating and Air Conditioning | 91 | 5.0★ (320) | Lake Zurich, 1 mi away | 24/7 | — |
| 4 | Legendary Service Inc. | 91 | 5.0★ (292) | Mundelein, 1 mi away | 24/7 | — |
| 5 | American Star Total Home Comfort | 91 | 5.0★ (1,104) | Rolling Meadows, 9 mi away | 24/7 | — |
| 6 | Cahill Heating, Cooling, Electric, Plumbing & Sewer | 91 | 5.0★ (1,064) | Lake Bluff, 9 mi away | 24/7 | — |
| 7 | AA Service Co. | 91 | 4.9★ (3,150) | Northbrook, 12 mi away | 24/7 | — |
| 8 | Mr. Heating and Cooling Inc | 90 | 5.0★ (283) | Lake Zurich, 3 mi away | 24/7 | — |
| 9 | Four Seasons Heating, Air Conditioning, Plumbing, Electric | 90 | 4.7★ (2,787) | Buffalo Grove, 6 mi away | 24/7 | — |
| 10 | TopTec Heating, Cooling, Plumbing & Electrical | 90 | 4.8★ (2,018) | Libertyville, 8 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Fairfield
Based in Arlington Heights, 7 mi away
Ranked #1 because of its Google rating and review volume: 4.7★ from 22,524 Google reviews, the most Google reviews on this list (22,524).
Based in McHenry, 14 mi away
Ranked #2 because of its Google rating and availability: 4.9★ from 6,580 Google reviews, open 24/7.
Based in Lake Zurich, 1 mi away
Ranked #3 because of its Google rating and availability: 5.0★ from 320 Google reviews, open 24/7.
Based in Mundelein, 1 mi away
Ranked #4 because of its Google rating and availability: 5.0★ from 292 Google reviews, open 24/7.
Based in Rolling Meadows, 9 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 1,104 Google reviews, open 24/7.
Based in Lake Bluff, 9 mi away
Ranked #6 because of its Google rating and availability: 5.0★ from 1,064 Google reviews, open 24/7.
Based in Northbrook, 12 mi away
Ranked #7 because of its Google rating and availability: 4.9★ from 3,150 Google reviews, open 24/7.
Based in Lake Zurich, 3 mi away
Ranked #8 because of its Google rating and availability: 5.0★ from 283 Google reviews, open 24/7.
Based in Buffalo Grove, 6 mi away
Ranked #9 because of its Google rating and availability: 4.7★ from 2,787 Google reviews, open 24/7.
Based in Libertyville, 8 mi away
Ranked #10 because of its Google rating and availability: 4.8★ from 2,018 Google reviews, open 24/7.
Based in Palatine, 7 mi away
Ranked #11 because of its Google rating and availability: 4.9★ from 766 Google reviews, open 24/7.
Based in Mundelein, 3 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 234 Google reviews, open 24/7.
Based in Elgin, 14 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 3,222 Google reviews, open 24/7.
Based in Hoffman Estates, 11 mi away
Ranked #14 because of its Google rating and availability: 5.0★ from 939 Google reviews, open 24/7.
Based in Libertyville, 8 mi away
Ranked #15 because of its Google rating and availability: 5.0★ from 428 Google reviews, open 24/7.
Based in Palatine, 9 mi away
Ranked #16 because of its Google rating and availability: 4.9★ from 1,082 Google reviews, open 24/7.
Based in Lake in the Hills, 12 mi away
Ranked #17 because of its Google rating and availability: 4.9★ from 1,374 Google reviews, open 24/7.
Based in Mundelein, 4 mi away
Ranked #18 because of its Google rating and availability: 4.9★ from 259 Google reviews, open 24/7.
Based in Buffalo Grove, 8 mi away
Ranked #19 because of its Google rating and availability: 5.0★ from 285 Google reviews, open 24/7.
Based in Prospect Heights, 12 mi away
Ranked #20 because of its Google rating and availability: 4.9★ from 1,120 Google reviews, open 24/7.
Based in Hoffman Estates, 11 mi away
Ranked #21 because of its Google rating and availability: 5.0★ from 530 Google reviews, open 24/7.
Based in Palatine, 8 mi away
Ranked #22 because of its Google rating and availability: 4.9★ from 473 Google reviews, open 24/7.
Based in Fox Lake, 9 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 340 Google reviews, open 24/7.
Based in Barrington, 5 mi away
Ranked #24 because of its Google rating and availability: 4.8★ from 506 Google reviews, open 24/7.
Based in Northbrook, 14 mi away
Ranked #25 because of its Google rating and availability: 5.0★ from 697 Google reviews, open 24/7.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 1,139 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Alex’s Duct Cleaning | 5.0★ (269) | 12 mi |
| Andrej's Construction | 5.0★ (2) | 10 mi |
| Anthonys Heating & Air | 3.0★ (2) | 8 mi |
| Bill's Heating and Cooling Service | 5.0★ (2) | 8 mi |
| G & R Heating and Air | 4.8★ (2,067) | 18 mi |
| G&G vargas | 5.0★ (2) | 11 mi |
| GO GREEN Heating & Cooling | 5.0★ (2) | 11 mi |
| Gordon's Plumbing Heating | 5.0★ (1) | In Fairfield |
| HeatForce Furnace Repair HVAC | 5.0★ (2) | 10 mi |
| Indoor Weather | 5.0★ (2) | 10 mi |
| Magic HVAC Inc | 5.0★ (2) | 10 mi |
| Reliable Oil Field Services Inc | 5.0★ (2) | In Fairfield |
| Residential Heating & Cooling | 4.9★ (905) | 16 mi |
| Scott & Sons Plumbing, Heating, A/C, & Electric | 2.0★ (1) | In Fairfield |
| Thermal Mechanical Inc. | 3.0★ (2) | 8 mi |
| THERMATRONIC INC. | 5.0★ (2) | 10 mi |
| TM HVAC contractor | 5.0★ (2) | 2 mi |
| Troyer Electric | 4.4★ (10) | In Fairfield |
| Vaughan Electric Heating & Air | 5.0★ (2) | In Fairfield |
| Vita HVAC Services | 5.0★ (2) | 6 mi |
National price ranges in USD, not adjusted for Fairfield. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 1,139 Fairfield HVAC contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.
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 | In Fairfield data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |