Top 50 of 1,024 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 Claremont: Steve's Five Star Service, 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 | Steve's Five Star Service | 66 | 4.9★ (1,292) | Upland, 2 mi away | 24/7 |
| 2 | All Pro Cooling, Heating, Plumbing & Electrical | 65 | 4.8★ (7,425) | Ontario, 10 mi away | 24/7 |
| 3 | Klaus & Sons Plumbing, Heating & Air Conditioning | 65 | 4.9★ (977) | Montclair, 2 mi away | 24/7 |
| 4 | Rooter Hero Plumbing & Air | 65 | 4.8★ (802) | Montclair, 1 mi away | 24/7 |
| 5 | Metz Air Control | 64 | 4.9★ (969) | Chino, 7 mi away | 24/7 |
| 6 | RC Air Heating & Air Conditioning Service | 64 | 4.9★ (705) | Rancho Cucamonga, 6 mi away | 24/7 |
| 7 | Service Hero Plumbing, HVAC, and Electrical | 64 | 4.8★ (1,506) | Covina, 9 mi away | 24/7 |
| 8 | Western Air Mechanical | 62 | 4.9★ (251) | San Dimas, 5 mi away | 24/7 |
| 9 | Home Comfort USA | 62 | 4.8★ (2,813) | Anaheim, 18 mi away | 24/7 |
| 10 | Turbo Plus Appliance Repair Service | 62 | 5.0★ (80) | Claremont | 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.
Open 24/7 · 4.9 from 1,292 Google reviews
#2All Pro Cooling, Heating, Plumbing & Electrical
Open 24/7 · 4.8 from 7,425 Google reviews
#3Klaus & Sons Plumbing, Heating & Air Conditioning
Open 24/7 · 4.9 from 977 Google reviews
Open 24/7 · 4.8 from 802 Google reviews
Open 24/7 · 4.9 from 969 Google reviews
#6RC Air Heating & Air Conditioning Service
Open 24/7 · 4.9 from 705 Google reviews
#7Service Hero Plumbing, HVAC, and Electrical
Open 24/7 · 4.8 from 1,506 Google reviews
Open 24/7 · 4.9 from 251 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 1,024 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 1,292 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Ontario, 10 mi away
Ranked #2 because of its Google rating and review volume: 4.8★ from 7,425 Google reviews.
Based in Montclair, 2 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 977 Google reviews, listed on Google as “HVAC contractor”.
Based in Montclair, 1 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 802 Google reviews, listed on Google as “HVAC contractor”.
Based in Chino, 7 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 969 Google reviews, listed on Google as “Air conditioning repair service”.
Based in Rancho Cucamonga, 6 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 705 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Covina, 9 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 1,506 Google reviews, listed on Google as “HVAC contractor”.
Based in San Dimas, 5 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 251 Google reviews, listed on Google as “HVAC contractor”.
Based in Anaheim, 18 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 2,813 Google reviews, listed on Google as “HVAC contractor”.
Based in Claremont
Ranked #10 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “HVAC contractor”.
Based in Corona, 16 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 1,325 Google reviews, listed on Google as “HVAC contractor”.
Based in Ontario, 6 mi away
Ranked #12 because of its Google rating and trade focus: 4.6★ from 507 Google reviews, listed on Google as “HVAC contractor”.
Based in Upland, 4 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 143 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Corona, 20 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 4,107 Google reviews, listed on Google as “HVAC contractor”.
Based in Corona, 16 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 1,213 Google reviews, listed on Google as “HVAC contractor”.
Based in Anaheim, 17 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 2,250 Google reviews, listed on Google as “HVAC contractor”.
Based in Fontana, 12 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 708 Google reviews, listed on Google as “HVAC contractor”.
Based in San Dimas, 6 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 122 Google reviews, listed on Google as “HVAC contractor”.
Based in Jurupa Valley, 20 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 1,203 Google reviews, listed on Google as “HVAC contractor”.
Based in Covina, 10 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 426 Google reviews, listed on Google as “HVAC contractor”.
Based in Anaheim, 17 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 995 Google reviews, listed on Google as “HVAC contractor”.
Based in Rancho Cucamonga, 10 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 201 Google reviews, listed on Google as “HVAC contractor”.
Based in Yorba Linda, 16 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 764 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Corona, 23 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 3,741 Google reviews, listed on Google as “HVAC contractor”.
Based in La Verne, 3 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 63 Google reviews, listed on Google as “Air conditioning 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 |