Hi,
I'm trying to troubleshoot possible causes for three consecutive fan motor burnouts in my oil furnace. The dealer/installer is no longer contactable and I'm getting nowhere with the manufacturer's website.
Having inspected what I could, one thing that doesn't seem right is the fan assembly (modern direct-driven drum type). The impeller blades are inclined outward in the direction of rotation i.e. as if to claw back air being forced out by centrifical force. Can this be correct? I could be wrong but it seems to me that blades should be straight, or if bent to a venturi curve and inclined as in this case, then the high (outboard) edge should be the trailing one.
The rotation direction matches the arrow on the drum housing but if motor-mounting holes were drilled as part of the installation then incorrect assembly would have been possible.
I've been on baseboards for over 25 years and the last oil furnace I had was still running without problems since 15 years when I had bought that house. I don't remember how it's fan was configured though, it was an older generation belt-driven rig.
TIA