Best 24/7 Emergency HVAC Repair in the Bay Area
Companies that answer after hours, and what to ask them
Part of our Bay Area best-of guides, lists for every city and service we cover.
Plenty of companies say “emergency service”. Fewer say, in writing, that someone answers at 2 a.m. on a holiday. Every company below states 24/7 or after-hours emergency service on its own website, and we link to where it says so.
At a glance
| # | Company | Based in | Focus | License |
|---|---|---|---|---|
| 1 | Cool Aid Air Conditioning & Refrigeration | Santa Clara | Residential and commercial HVAC, commercial refrigeration | C-20 & C-38 |
| 2 | Kailey Air Systems | San Jose | Residential and commercial HVAC repair and installation | #1093765 |
| 3 | Silicon Valley Comfort (Air Systems) | San Jose | Owner-operated HVAC diagnostics and repair; Bryant installer | — |
| 4 | Aire Serv of San Jose | San Jose | Heating and cooling repair, replacement and maintenance (locally owned franchise) | #1110274 |
| 5 | Comfort Energy, Inc. | San Jose | Residential AC, furnace, boiler and ductless repair and installation | — |
| 6 | All Fresh Temp Heating & Air Conditioning | San Jose | AC and heating repair/installation, heat pumps; also plumbing and roofing | — |
| 7 | IRBIS Air, Plumbing & Electrical | San Jose | HVAC, plumbing and electrical | #1048009 |
| 8 | Galaxy Heating & Air Conditioning | Pleasant Hill | Residential heating and AC repair and installation | #1076868 |
License numbers are shown only where the company prints one on its own site. Check any contractor on the CSLB license lookup before you hire.
How we picked
We only included companies whose own website explicitly offers 24/7 or after-hours emergency HVAC service, and we cite that page for each one. A company that takes “emergency repairs” during business hours did not qualify. We favoured companies based in Santa Clara County and southern Alameda County. We do not publish star ratings or review counts.
The order after #1 reflects how close each company is to the South Bay. It is not a quality score, and no company paid to be included.
#1 — Cool Aid Air Conditioning & Refrigeration
Cool Aid is a family-owned HVAC and refrigeration contractor founded in 1966 and based in Santa Clara. We answer emergency calls 24/7 for homes and for businesses, including commercial refrigeration failures, and we publish this list.
What stands out
- 24/7 emergency HVAC and refrigeration service across the Bay Area
- C-20 and C-38 licensed; EPA Universal certified technicians
- Residential heating and cooling, commercial HVAC, walk-in coolers and ice machines
- Every job backed by a 1-year parts & labor warranty
See 24/7 emergency HVAC repair and emergency refrigeration service.
#2 — Kailey Air Systems
Residential and commercial HVAC repair and installation.
What stands out
#3 — Silicon Valley Comfort (Air Systems)
Owner-operated HVAC diagnostics and repair; Bryant installer.
What stands out
#4 — Aire Serv of San Jose
Heating and cooling repair, replacement and maintenance (locally owned franchise).
What stands out
#5 — Comfort Energy, Inc.
Residential AC, furnace, boiler and ductless repair and installation.
What stands out
#6 — All Fresh Temp Heating & Air Conditioning
AC and heating repair/installation, heat pumps; also plumbing and roofing.
What stands out
#7 — IRBIS Air, Plumbing & Electrical
HVAC, plumbing and electrical.
What stands out
#8 — Galaxy Heating & Air Conditioning
Residential heating and AC repair and installation.
Based in Pleasant Hill in Contra Costa County, outside the South Bay, but it lists Fremont, Newark and Santa Clara County cities as service areas.
What stands out
Before you call: what counts as an emergency
- Smell of gas: this is not an HVAC call. PG&E says to leave the area immediately, call 9-1-1, then call PG&E’s 24-hour line at 1-877-660-6789. (PG&E)
- No heat in a cold snap with infants, older adults or anyone medically vulnerable at home.
- No cooling in a heat wave, for the same reasons.
- Burning smell, tripped breaker that trips again, or water pouring from an indoor unit. Turn the system off at the thermostat and the breaker before you call.
- Commercial refrigeration failure with product at risk.
Many other faults can safely wait until morning. Our what to do in an HVAC emergency guide walks through the checks to make first.
What to ask before a technician comes out
- Is there an after-hours or trip charge, and how much? Some companies publish it and some charge none; ask either way.
- Is the diagnostic fee credited against the repair?
- Roughly when will a technician arrive?
- Will they carry common parts, or is a second visit likely?
Frequently asked questions
What should I do if I smell gas near my furnace?
Leave the area immediately, call 9-1-1, then call PG&E’s 24-hour line at 1-877-660-6789. Do not switch lights or appliances on or off on the way out. (PG&E)
Do emergency HVAC calls cost more after hours?
Often, but not always. Some companies publish a flat after-hours diagnostic fee and some say they add no surcharge. Ask before the technician is dispatched, and ask whether the fee is credited toward the repair.
Is no heat an emergency in the Bay Area?
It can be. Bay Area winters are mild, but overnight lows still drop into the 30s. If anyone at home is vulnerable to cold, treat it as urgent. Otherwise a safe space heater and a first-thing-morning appointment may do.
Does Cool Aid offer 24/7 emergency service?
Yes, for homes and businesses across the Bay Area. Call 1-800-266-5243.
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