The combustion air fan on my furnace has jammed up. When I put the heat on, an electric hum is all I get until I go to the furnace and spin the fan shaft with my hand to get it going. Then the furnace works as normal.
Is it worth cleaning the fan, or should I just replace it?
When I tried to take it off, there were three obvious screws that I unscrewed, but the fan, though very loose, did not come out. Is there a trick to it?
As I'm not much of a DIYer, I'm also wondering if this is the kind of job I should attemp. Maybe get a pro?
My furnace is a Lennox G50UH 24A-070-03