I have a heil pgaa36d1k3 and air works fine. Heat worked fine last year but I didn't use it a lot. Now when I turn on the Thermostat it clicks and the heil makes a humming sound. I never hear the gas kick on or smell it when I pulled the cover off it to check. It just sits there and hums. The board looks new with no burn marks on it.
I'm thinking its cause I let it sit most of the winter with out use.


Any ideals?