Furnace Repair in Mountain View
Mountain View summers stay mild under the marine layer, so cooling load is light and a lot of the older housing around Old Mountain View went up with a gas furnace and no central cooling at all. In those homes the furnace is not a backup, it is the only conditioning the house has, and when it quits on a cold January morning it gets noticed fast.
The starter ranches from the 1940s through the 60s tend to run tight, with original ductwork and furnaces that have been patched more than once. On those we usually find the standard failures first: a cracked hot surface ignitor, a flame sensor fouled with carbon, or a draft inducer that is starting to whine on a system past a dozen years. We test gas valve function and read carbon monoxide on every gas call before we touch anything else, because a furnace that old in a tight floor plan is exactly where a heat exchanger crack matters.
The newer infill near Cuesta Park is a different repair. Some of that stock runs heat pumps or sealed packaged units rather than a conventional gas furnace, and the diagnostics there are about control boards and reversing valves, not burners. We service both, and we tell you on the estimate which one you actually have and what the honest repair-versus-replace line is for its age.
What we run into in Mountain View
Hot surface ignitor and flame sensor. The two most common no-heat calls on the older Old Mountain View furnaces. A cracked ignitor or a carbon-fouled flame sensor stops ignition cold. We carry both. Cleaning the sensor often fixes it; if the ignitor is cracked we replace it and confirm a clean light-off before we leave.
Carbon monoxide and heat exchanger check. Every gas furnace call gets a CO meter reading and a heat exchanger inspection. On a 40-plus-year furnace in a tight ranch floor plan, a cracked exchanger is a real safety issue. If we find one we show it to you on camera and shut the unit down before we leave.
Heat pump and packaged unit diagnostics. Newer Mountain View infill often runs a heat pump rather than a gas furnace. No-heat there usually traces to a reversing valve, a control board, or a defrost sensor. Different parts, different testing, and we diagnose the actual fault rather than swapping parts to find it.
Draft inducer and blower repair. On furnaces past 12 years the draft inducer motor starts to wear, and you hear it before it fails. We test amp draw and bearing condition and put the number on the estimate so you can decide before it strands you mid-winter.
Honest repair-or-replace math. If your furnace is heat-only and past 20 years, a replacement is also the moment to look at adding the cooling these homes never had, often with a heat pump. We run the math at the estimate and check current rebate eligibility before any sale conversation.
Furnace Repair in Mountain View: common questions
How fast can you get to Mountain View for a no-heat call?
My old Mountain View house has heat but no AC. Is the furnace still worth repairing?
Do you charge a diagnostic fee for furnace repair?
Nearby and related
Furnace Repair near Mountain View: Palo Alto · Los Altos · Sunnyvale .
Other HVAC services in Mountain View: AC Repair · Ductless Mini-Split · Heat Pump Installation & Service · HVAC Installation · Maintenance Plans .
Common furnace repair problems in Mountain View: Furnace Blowing Cold Air · Furnace Not Heating .
See the full furnace repair overview or our Mountain View service area.
Furnace Repair in Mountain View
Free on-site assessment, written the same day.
Bay Area · 7am–7pm · 7 days · no overtime charges