I have a Heil Model# NUG5100BFA1 , it operates and the heat shuts off at end of cycle, but the blower motor doesn't shut off.
Does it need to shut off to begin another heat cycle?
Even when I shut the switch off and turn it back on, the motor continues to run. Any ideas?

1st I would check the thermostat to make sure its set on auto, not fan or fan only
If that's no help look at thermostat wire and make sure there are no frays or shorted wires,, next would be the fan control