HVAC Repair in San Jose, CA
Heater stuck on blast? AC refusing to cool? Our licensed contractors get your whole system back online quickly.
HVAC Repair in San Jose & the Bay Area
Heating, cooling, thermostat, or airflow — when any part of your home comfort system misbehaves, Promax fixes it. We're a licensed C-20 HVAC contractor (Lic #1133885) repairing every type of system installed in San Jose homes: gas furnaces, central AC, heat pumps, ductless mini splits, package units, and zoned systems, from every major manufacturer.
Our diagnostic process is methodical, our pricing is flat-rate and approved by you before work starts, and our repairs are guaranteed. We're open 7 days a week from 7 AM to 10 PM, because comfort problems don't respect business hours — and neither do we.
HVAC Repair, Done Right
Every HVAC repair visit is built around three things: finding the real cause, fixing it with parts already on the truck, and getting a licensed technician to your door fast. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Diagnostic fee waived with any repair.
- Fully stocked trucks carry parts for most repairs on the first visit
- We repair Bryant, Carrier, Trane and every other major brand
- Licensed, EPA-certified technicians on every call
- We stand behind our work — service and spare parts are both covered
What's Included With HVAC Repair
Every hvac repair visit covers the items below, and the scope and price are confirmed in writing before any work starts. When it's finished the technician walks you through what was done and what to watch for. We call back within one business hour, 7 AM – 10 PM.
- Methodical diagnosis across heating, cooling, thermostat, and airflow issues
- Flat-rate pricing approved by you before work starts
- Diagnostic fee waived when you approve the repair
- Guaranteed repairs backed by our own labor warranty
- 7 days a week, 7 AM–10 PM, no weekend surcharge
Signs You Need HVAC Repair
Each symptom below means a part is wearing out or already failing, and these problems rarely fix themselves. Waiting usually lets a small fault damage other components, which turns a modest repair into a larger one and raises the odds of a breakdown at the worst possible time. Call (669) 777-1997 or book online, and a technician will pinpoint the cause.
- No heat, no cooling, or the system won't turn on at all
- The thermostat is blank or unresponsive
- Airflow is weak, uneven, or one room won't reach temperature
- Strange noises, smells, or a tripped breaker when the system runs
Brands We Repair
Promax is a Mitsubishi Diamond Contractor and Bryant Factory Authorized Dealer, so Mitsubishi Electric and Bryant equipment is repaired by technicians with factory-backed training. We repair every other major brand as well, whatever name is on your equipment. Our fully stocked trucks carry common parts for these brands, so most repairs are finished in a single visit.
Need HVAC repair help in San Jose?
Related Services
Most hvac repair jobs touch one of these, and the same licensed Promax team handles all of them. Each page lists what's included, typical costs and the questions San Jose homeowners ask most. Not sure which you need? Call (669) 777-1997 and we'll point you to the right one.
Where We Work
Promax Service Group serves homes and businesses in San Jose, across Santa Clara County, and in nearby Peninsula and East Bay cities. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Choose your city for local details, or call (669) 777-1997 to confirm we cover your address.
Frequently Asked Questions
Do you charge for HVAC diagnostics?
We charge a standard diagnostic fee that is waived entirely when you approve the repair with us. That applies every day of the week, including weekends.
Which HVAC brands do you service?
All of them — Bryant, Carrier, Trane, Lennox, Rheem, Ruud, Goodman, Amana, Daikin, Mitsubishi, Fujitsu, American Standard, York, and more. Factory relationships with Bryant and Mitsubishi give us fast access to OEM parts.
My thermostat is blank — is that an HVAC problem?
Usually yes: a tripped float switch from a clogged condensate drain, a blown low-voltage fuse, or a failed transformer commonly kill thermostat power. All are quick fixes for a technician — and much cheaper than the new system a blank screen makes people fear.
How fast can you respond to a no-heat or no-cool emergency?
We offer same-day service for no-cool, no-heat, and no-hot-water calls, 7 days a week — call in the morning for the best chance of same-day arrival. Non-emergency repairs are typically scheduled within a day or two.
Do you guarantee your repair work?
Yes — every repair is backed by our own labor warranty, and we use OEM or OEM-equivalent parts so manufacturer warranties stay intact where applicable.