Any HVAC guys out there?

T.G · 02-05-2012, 11:57 AM

311AV? Fan sounds fine, look up the blink code and check the hot surface ignitor located by the pilot light, see if it has a hole burned through it.

When you run diagnostics, or even just close the gas valve and then kick the thermostat to heat so that the furnace tries to come on, it should glow bright orange changing to white. Then the solenoid for the pilot will open, lighting the pilot.

Hot surface ignitors burn out - they wear through, especially if the furnace cycles on and off a lot.

Will try and find a photo.

If it's not the ignitor, call a tech.

02-05-2012, 11:57 AM	#15
T.G Grrrrrr Join Date: Mar 2009 First Name: The Other Adam Posts: 15,578 Trading: (37)	Re: Any HVAC guys out there? 311AV? Fan sounds fine, look up the blink code and check the hot surface ignitor located by the pilot light, see if it has a hole burned through it. When you run diagnostics, or even just close the gas valve and then kick the thermostat to heat so that the furnace tries to come on, it should glow bright orange changing to white. Then the solenoid for the pilot will open, lighting the pilot. Hot surface ignitors burn out - they wear through, especially if the furnace cycles on and off a lot. Will try and find a photo. If it's not the ignitor, call a tech. Last edited by T.G; 02-05-2012 at 12:04 PM.