Check Heater Relay
Possible Cause #
- Heater Relay.
What to Check - Field #
- Contact points are fused together. (unseen from exterior)
Action Needed - Field #
- Disconnect power, remove red & black wires from relay. Reconnect power. Volt meter should NOT read 9-12VDC. If it does the main control board needs to be changed. If there is not a reading of 9-12VDC replace the heating relay.
Caution #
Resolution
Did Check Heater Relay resolve the issue?
Yes, resolution code 303.
No, go to next step.