Boiler Not Heating in San Francisco, CA
When the boiler runs but the house stays cold, the problem is usually on the water side. When the boiler is silent, it is usually power, gas or ignition.
Start with the easy checks. Is the thermostat calling for heat, with fresh batteries? Is the service switch at the top of the basement stairs on? Is the pressure gauge in the normal range, around 12 to 15 psi on most hot water systems? A low reading can trip the low-water cutoff and stop the burner.
Reliable Boiler Service connects San Francisco, CA homeowners with technicians who trace the rest: a circulator that hums but does not spin, a zone valve stuck closed, air trapped at the high point of a loop, or one cold zone that points to a thermostat wire.
If only the upstairs is cold, air in the system is the likely cause. If every zone is cold, look at the boiler itself.
Call Reliable Boiler Service at (866) 456-6311 when your boiler is not heating.
