A furnace that won't light or keeps shutting off needs real diagnosis, not another reset. A CO check happens on every call, standard, not an upsell.
A short list of components causes most Furnace Repair calls: ignitor, flame sensor, gas valve, heat exchanger. Each gets tested with a multimeter and combustion analyzer, not replaced on a hunch, not parts-cannon guessing.
Safety and accuracy on every heating call.
A combustion analyzer reading for dangerous CO levels is part of every visit, not optional.
We bump no-heat calls ahead of routine visits when it's cold.
A fixed price is set before repairs start.
Our techs are trained equally on gas furnaces and electric heat strips, no exceptions.
Six repairs that cover most of our winter calls.
These two parts are behind most no-heat visits, usually a same-visit fix.
Gas valve testing confirms the fault before we recommend replacing it.
We inspect carefully with proper equipment rather than assuming based on age.
Short-cycling or mid-cycle shutdowns often trace to the limit switch or a struggling blower before condemning the control board.
Older San Francisco furnaces with standing pilots have their own failure points — thermocouples, pilot orifices, draft issues that newer ignition doesn't have.
Zero response from the furnace can mean a wiring fault, not a furnace failure to avoid overcharging for parts you don't need.
What happens from your call to heat restored.
Tell us what the furnace is doing and we'll get someone moving.
A stocked truck arrives ready to diagnose and often repair same visit.
Combustion analysis happens before any repair is quoted, then a flat-rate quote.
We re-check CO before signing off, backed by warranty.
Feedback from completed furnace repairs.
Pilot light kept going out on our older furnace every few days. Tech identified a failing thermocouple that two other companies had overlooked.
— H. Delacroix, homeowner
Furnace made a loud bang on startup that scared the whole family. Turned out to be a delayed ignition issue from a dirty burner, cleaned and resolved same visit.
— F. Ibekwe, homeowner
Called about a gas smell near the furnace closet and they had someone here within the hour to confirm it was safe before doing any repair work.
— Q. Whitmore, homeowner
Landlord here with an older building, they've kept three separate furnace units running through two winters without a single emergency callout.
— Z. Andreou, landlord
Common questions before a Furnace Repair visit.
Clicking without ignition often points to the ignitor, but we confirm with a resistance test before quoting.
Yes — it can let combustion gases into breathing air, we won't run a confirmed-cracked unit, taken seriously.
A CO check is standard on every call, no upcharge.
Yes — thermocouple and draft-related repairs are covered.
No-heat calls get priority routing, usually same-day even during high demand.
Common parts are stocked, rare ones may need next-day ordering to finish the repair.
Our furnace repair coverage spans San Francisco and nearby San Francisco, CA zips below — call to confirm.
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