When your house stops being warm at 6am on a cold Bay Area morning, you want a technician on the way, not a callback ticket. Onzone runs same-day heating repair for furnaces, boilers, and heat pumps.
Combustion safety check on every gas system we touch. Written diagnostic report at the end of every call. No-heat calls jump to the front of the queue every time.
A gas furnace may click, start the inducer, or shut down when ignition sensors, gas valves, or burners fail.
Heat pumps can lose heating output from low refrigerant, reversing valve issues, defrost faults, or outdoor fan problems.
Radiators or hydronic zones may stay cold when circulator pumps, zone valves, air, pressure, or controls need service.
Electric furnaces can trip breakers or stop heating when sequencers, heating elements, blower motors, or wiring overheat.
Every gas-fired system we touch gets a CO sweep and combustion analysis. Heat that’s also safe is the whole job, not an extra.
No-heat calls are dispatched first. Bay Area winters can get cold — we don’t make you wait two days for a furnace.
You get a written report at the end of every call — what was wrong, what we did, and what to watch for. Useful for insurance and future warranty claims.
That’s “short cycling” — usually a dirty filter, a failing flame sensor, an oversized furnace, or a thermostat placement issue. Easy to diagnose on a single visit. Most of these are inexpensive to fix.
Rule of thumb: if the unit is 15+ years old and the repair quote is over half the cost of a new install, replacement usually wins on both cost and efficiency. We’ll lay out both options — we’re not commission-selling replacements.
Yes. Heat pump repair is some of our most common work — reversing valves, defrost controls, refrigerant charge, contactors. Both ducted and ductless mini-split heat pumps.
