Heating & Furnace Services in San Jose, CA
Heating services in San Jose and Santa Clara County you can count on — from emergency furnace repair to energy-efficient installations.
Furnace in San Jose & the Bay Area
Bay Area winters may be mild, but a dead furnace on a 38° January morning in San Jose is still an emergency. Promax Service Group delivers fast, honest furnace service across San Jose and Santa Clara County: emergency heating repair, high-efficiency furnace installation, annual safety inspections, and heat pump conversions for homeowners ready to go all-electric.
Our EPA-certified technicians work on all gas and electric furnace brands and install 80%–96%+ AFUE Bryant systems sized correctly for your home. Every heating repair includes a combustion safety check and carbon monoxide test — because a safe furnace matters as much as a warm house.
Furnace, Done Right
Here is what our furnace work covers: system design and installation, repairs on every major brand, seasonal maintenance, and licensed, EPA-certified technicians on every job. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Free in-home estimates on new systems and replacements.
- Full-system design, sizing, and installation
- Repairs on every major brand, with parts on the truck for most first visits
- Seasonal maintenance that prevents costly breakdowns
- Licensed, EPA-certified technicians for every job
What's Included With Furnace
Every furnace 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.
- Combustion safety check and carbon monoxide test on every furnace visit
- Correct sizing based on your home, not just the old nameplate
- Mechanical permit and required venting brought up to current code
- Manufacturer and Promax labor warranty registration
Need furnace help in San Jose?
Related Services
Most furnace 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
Why is my furnace blowing cold air?
Common culprits include a faulty igniter, a dirty flame sensor, a stuck gas valve, or a thermostat fan setting stuck on ON. Some are quick fixes; others signal a failing heat exchanger, which is a safety issue. We diagnose it on-site with upfront pricing before any repair.
Should I repair or replace my old furnace?
A useful rule: if the furnace is 15+ years old and the repair costs more than a third of replacement, replace it. New 96% AFUE models cut gas usage dramatically, and switching to a heat pump may still qualify for some current incentives — we'll check exactly what applies to your project at the free estimate.
How often should a furnace be inspected in the Bay Area?
Annually, ideally each fall. A tune-up cleans the burners and flame sensor, verifies safe venting, tests for carbon monoxide, and catches small failures before they leave you without heat on the coldest week of the year.