All,
My Furnace has been kicking on when the heat turns on but the Furnace
Fan is never kicking off. The Fan Control on the Thermostate is set to Auto
but still no luck. Sometimes it will turn off but only after a long period
of time. The Fan Limit Control is a Disc Fan Limit Control so it can not be
set and must be replaced. My question is how easy is it to replace? Is there
any tests I can perform to verify that this is the bad part?

Thanks