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Additional Service Information
• Testing the External Thermal Protector:
• After allowing sufficient time for the thermal protector to reset, disconnect it and test for
continuity across the terminals. If there is no continuity, replace the thermal protector.
• Disconnect and test the compressor wiring by confirming that there is continuity between relay
terminal 5 and compressor terminal C and also between terminals 2 and S as well as 4 and R.
• Replace the potential relay if all other tests do not reveal the problem. A new relay will
eliminate any electrical problems that cannot be determined with the previous testing. If a
new relay does not correct the operation, the compressor may have a mechanical problem.
Note: Excessive short cycling may be caused by a faulty thermal protector, but it also may be
caused by other malfunctioning system components such as the bin thermostat, Ice-Off-Wash
switch, and contactor or high pressure cut-out.
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