Bradford-White Corp M4503, CX), MI50L Resettable Thermal Switch Replacement, Over Tighten Screws

SERVICE PROCEDURE RG-VII

Resetting Thermal Switch

Testing and Replacement

RESETTABLE THERMAL SWITCH REPLACEMENT

Step 1. Rotate knob of combination thermostat gas valve to the off position.

For White Rodgers Control, depress knob slightly and rotate clockwise to the “OFF” position.

For Robertshaw Control, rotate knob clockwise to the “OFF” position.

Step 2. Remove outer jacket door.

Step 3. Disconnect wire leads from resettable thermal switch.

Step 4. Remove resettable thermal switch from inner door (Phillips screw driver)

Step 5. Place new resettable thermal switch in place. Be sure contact surface of resettable thermal switch and inner door are free of any debris. Secure resettable thermal switch into place using screws from step 4. DO NOT

OVER TIGHTEN SCREWS.

Step 6. Reconnect wire leads from combination thermostat/gas valve to resettable thermal switch.

Note: Wire termination are interchangeable with either resettable thermal switch connection.

Step 7. Replace outer jacket door

Step 8. To resume operation follow the instructions located on the lighting instruction label or the lighting instruction located in the installation and operation manual.

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