No heat
Thermostat, power, gas supply, ignition and control-board testing to find why the furnace will not fire.
FURNACE REPAIR · SAN FRANCISCOFurnace Repair
Furnace Repair
in San Francisco, CA.
No heat on a foggy San Francisco night? HAXX repairs gas furnaces, floor furnaces and wall heaters, and checks the wiring and safety controls.
Serving the Sunset, the Richmond, Noe Valley, Bernal Heights, Pacific Heights and West Portal and the rest of San Francisco. Share your address to confirm availability.
4.8 rating · 515+ reviewsHVAC & electrical, one teamPermits handledCA Lic #1081990
Furnace problems
we fix.
Gas furnaces in attics, closets, garages and crawl spaces. Every repair visit includes basic safety checks on the burners and venting.
Igniter and flame sensor faults
Furnaces that click, light and shut off are often a dirty flame sensor or a failing hot-surface igniter.
Blower runs but air is cold
Limit switches, pressure switches and inducer motors checked in order.
Short cycling
Overheating from restricted airflow, a dirty filter or an oversized furnace.
Noises and smells
Banging, squealing or a burning smell checked before the next cold night.
Safety checks
Venting, heat-exchanger visual check and carbon monoxide concerns raised in plain language.
SAN FRANCISCO DETAILSFurnace repair
Furnace repair
in San Francisco.
With a median home built around 1948, San Francisco has many old furnaces in basements and garages. Heating runs much of the year here, so wear adds up.
01
Ignition and flame sensors
Most no-heat calls trace to igniters, flame sensors, pressure switches or control boards. The technician tests each before replacing parts.
02
Garage and basement units
Furnaces under Sunset and Richmond homes sit in garages with old ducts. Leaky ducts and blocked returns are noted during the repair.
03
Repairs remain allowed
San Francisco's all-electric rule for major renovations does not stop you from repairing a working gas furnace.
What customers say
about HAXX.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
★★★★★
“Thorough diagnostics of A/C system, identified and repaired the issue quickly!”
★★★★★
“Service was performed well and on time. Service person was highly skilled and provided easy to understand options to deal with the issue. Price for diagnostics was reasonable and easy to pay online.”
★★★★★
“Our commercial building had several HVAC problems, and their team carefully diagnosed each unit, explained the available options, and never pressured us into unnecessary replacements. They worked hard to repair what could be repaired and kept us informed throughout the process.”
HOW A REPAIR VISIT WORKSFrom the first call
From the first call
to a working system.
01
Tell us the symptom
Brand, model and what it is doing. Photos of the label or error code help.
02
Diagnose on site
The technician tests the system and finds the cause, not just the symptom.
03
Approve the price
You see the repair price before work starts, and the options if a repair is not worth it.
04
Fix and test
The repair is completed and tested, or scheduled once the part arrives.
HAXX ON SITEReal work.
Real work.
Real homes and businesses.
A closer look at recent heating and cooling work by HAXX. Projects in San Francisco are marked with the city.
THE PEOPLE BEHIND THE WORKHands-on work.
Hands-on work.
A real look inside.
On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projectsRecent Projects
System Recharge and Brazing Correction
System recharge and brazing correction.
Carrier Furnace Diagnosis and Repair
Carrier furnace diagnosis and repair.
Attic Plenum Resealing
Attic plenum resealing.
Gas Furnace Service
Gas furnace service.
San Francisco Basement Subpanel and Circuits
Basement subpanel and circuits.
Heat Pump Installation
Heat pump installation.
Outdoor Heat Pump Installation
Outdoor heat pump installation.
Heat Pump Air Handler Installation
Heat pump air handler installation.
GOOD TO KNOW
Furnace Repair in San Francisco: questions, answered.
Can I still repair a gas furnace in San Francisco?
Yes. Repairs are allowed. Bay Area air district rules on new zero-NOx furnaces apply to sales of new units starting in 2029, not to repairs.
Do you work on floor furnaces and wall heaters?
Yes. HAXX services many older gas heaters found in San Francisco homes and will tell you when replacement is the safer choice.
Should I replace my furnace with a heat pump?
If the furnace is old or the repair is expensive, it is worth pricing a heat pump, which also adds cooling. HAXX can quote both.
Is it safe to run a furnace that smells like gas?
No. Turn it off, leave the house if the smell is strong, and call PG&E or 911. Call HAXX for the repair once the area is safe.
LET’S TALK ABOUT YOUR PROPERTYTell us what you need.
Tell us what you need.
We’ll start there.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.