10 Best 24-Hour in
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Quick answer #1 is Mountainside Air Conditioning Repair (5.0★, 649 reviews)
The best-rated 24-hour HVAC contractors in Phoenix, AZ are Mountainside Air Conditioning Repair (5.0★, 649 reviews), One Hour Heating & Air Conditioning (5.0★, 514 reviews) and Ideal Air Conditioning and Insulation (4.9★, 1,550 reviews).
- 4.9★average rating
- 20,968Google reviews
- 10open 24/7
- 7hvac specialists
Checked · How we rank
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About this list
These are the 10 highest-rated HVAC contractors in Phoenix that are open 24 hours a day, 7 days a week. Out of 86 HVAC contractors in Phoenix with round-the-clock hours, these average 4.9 stars across 20,968 Google reviews. Mountainside Air Conditioning Repair ranks first with 5.0 stars from 649 reviews.
Compare all 10 side by side
| # | Business | Rating | Reviews | 24/7 |
|---|---|---|---|---|
| 1 | Mountainside Air Conditioning Repair | 5.0 | 649 | Yes |
| 2 | One Hour Heating & Air Conditioning | 5.0 | 514 | Yes |
| 3 | Ideal Air Conditioning and Insulation | 4.9 | 1,550 | Yes |
| 4 | Day & Night Air Conditioning, Heating, & Plumbing | 4.9 | 9,878 | Yes |
| 5 | American Home Water & Air | 4.9 | 3,449 | Yes |
| 6 | AZ Perfect Comfort Heating & Cooling | 4.9 | 810 | Yes |
| 7 | Desert Diamond Air & Plumbing | 4.9 | 2,534 | Yes |
| 8 | Benefit Air Conditioning | 4.9 | 759 | Yes |
| 9 | All Area A/C & Heating | 5.0 | 230 | Yes |
| 10 | Semper Fi Heating and Cooling | 4.9 | 595 | Yes |
Before you hire an HVAC contractor
5 quick checks before you call.
- Check the license.
In Arizona, look them up with the Arizona Registrar of Contractors (ROC).
- Ask for proof of insurance.
Liability insurance covers damage to your home if something goes wrong.
- Get 2 or 3 written quotes.
Compare what each one includes, not just the price.
- Don't pay everything upfront.
A deposit is normal. Pay the rest when the work is done.
- Read the newest reviews.
Recent reviews say more about the business today than old ones.
Questions people ask
Who is the best-rated 24-hour HVAC contractor in Phoenix?
Mountainside Air Conditioning Repair ranks #1 with 5.0 stars from 649 reviews.
How many HVAC contractors in Phoenix are open 24 hours?
We found 86 HVAC contractors in Phoenix open 24 hours, 7 days a week. These are the 10 with the best ratings.
Which HVAC contractor in Phoenix has the most reviews?
Day & Night Air Conditioning, Heating, & Plumbing has the most, with 9,878 Google reviews and a 4.9 rating.
How do I check if an HVAC contractor in Phoenix is licensed?
Look them up with the Arizona Registrar of Contractors (ROC) at https://roc.az.gov/. Also ask for proof of insurance before work starts.
How is this list ranked?
We rank by Google star rating weighted by review count, so a 4.9 with 400 reviews beats a 5.0 with 8. HVAC specialists get a small edge over companies that also list other trades. Details were last checked Nov 2, 2026.
Other services in Phoenix
- Plumbers
- Electricians
- Roofers
- Landscapers
- House Cleaners
- Painters
- Pest Control Companies
- Garage Door Companies
- Movers