This gas furnace runs OK some of the time, but will not ignite sometimes unless I switch the thermostat off and on again (2nd thermostat-both problems). May run for days and recycle properly, then quit again.
Furnace turns on only some times. Thermostat is fine, error code 14 then 34 (Ignition Proving Failure) This is a two stage furnace. Blower comes on first, then gas turns on. Furnace attempts to light several times, but never makes it and then starts to flash code 34. Sensor has been cleaned. We've had 3 furnace repair guys to look at it and it's still not working! Frankly, they are stumped and are telling me to replace it.
It's only 5 years Old!!!
Tags: