repair: found hot surface ignitor damaged and unable to ignite. Exhaust motor is grinding in the motor bearings, indicating rust and imminent seizing of the motor. Door switch to the unit has been removed. Recommend replacing ignitor, exhaust motor, and door switch. After replacing ignitor there could be other issues with the heating system, further down the sequence of events. Replaced ignitor, system is heating now, will need to return with the exhaust motor. Exhaust motor has been replaced. System is heating at this time.