Friend has a gas boiler with radiant heat and noticed today that it
starts firing, shuts off, repeats, for about a minute or two before it
The water heater has a flame and has maintained temperature (in the
same room) and the temperature in the house has not dropped below the
prescribed level from the programmable thermostat (there is water flow
through the pipes that provide radiant heat, but there is a whiff of
gas that can be smelled during the firing on/off.
I've read where this can be caused by low water flow through the
system, or just a dirty burner.
Several service calls have been placed to local service businesses,
but have not been responded to yet.
Is there anything to be reset or that can be manually cleaned?