Can anyone help. I have a Heil 7000 furnace. The unit exhasut fan comes on, the burners light, but the main blower will not run. I initially tried running it with the blower on and the furnace running and got heat last night, but by morning the main blower stopped running. Swapped thermostats as well and no good. I have visuall checked connections and all looks good.
Sounds like it could be blower motor no good, capacitor for motor bad, relay/control board controlling motor no good, or perhaps flame sensor.
Does the blower run if you put the thermostat to fan only?
IF yes, then rule out blower motor, relay, and capacitor.
Post back with what you find out so far.