Question about Heating & Cooling
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!!!
I had the same problem with mine. Check the thermocouple located in front of the far left burner. Make sure all of the wiring connections are secure and the flame is directly contacting the thermocouple. The processor allows for about 15 seconds between the time the gas valve opens and the thermocouple heats up enough to prove flame. If the flame is not proven within 15 seconds, the gas valve closes and the house fan starts and runs for about 1 minute. Then the house fan stops and it trys to restart.
Posted on Nov 22, 2008
Your hot surface igniter may be bad. It may be cracked which would prevent it from starting the burner flame.
Posted on May 22, 2008
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Posted on Jan 02, 2017
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