Replacing the Air Heater High Limit

To avoid electrical shock or property damage, disconnect power before installing or servicing equipment. A qualified technician must perform the service procedures.

Remove module top.
Remove wires from high limit.
Check across the terminals for continuity. If the unit is not heating, the circuit should be closed, or read no resistance. If high limit is defective, continue onto step 4.
Remove the 2 screws securing the high limit and remove high limit.
Install new high limit in reverse order and unit is now ready for use.