Hello again Wayne,
Just doing some trouble shooting on my furnace in which the fan comes on but the heater never clicks on. I removed the screws on the exterior vent but the grate still doesn't come off. Is it supposed to be able to come off? Don't want to break anything. Just want to see if there's anything I can clean up even though there doesn't seem to be any visible obstructions.
Right now, I no longer hear any clicking sounds in which the igniter even attempts to ignite. Thanks.
Just doing some trouble shooting on my furnace in which the fan comes on but the heater never clicks on. I removed the screws on the exterior vent but the grate still doesn't come off. Is it supposed to be able to come off? Don't want to break anything. Just want to see if there's anything I can clean up even though there doesn't seem to be any visible obstructions.
Right now, I no longer hear any clicking sounds in which the igniter even attempts to ignite. Thanks.
wavery said:It's most likely an air flow issue. The furnace has a "Sail switch" in the air intake and the exhaust outlet. If there is any airflow disturbance when the fan kicks off, the gas valve will shut off immediately.
It could be spider webs, mud dobber nests or a host of other obstructions. Those furnaces are pretty indestructible and very serviceable. They seldom need replacing.
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