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Diagnostics
Table of Contents
Efficient Use of Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Failure Causes (Table 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Main Control Board (Low-Voltage Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Main Control Board (120 VAC Side). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Main Control Board Locator Table (Low-Voltage Side) . . . . . . . . . . . . . . . . . . . 36
Main Control Board Locator Table (120 VAC Side) . . . . . . . . . . . . . . . . . . . . . . 38
Fresh Food Warm - Freezer Warm (Diagnostic Chart) . . . . . . . . . . . . . . . . . . . . 39
Freezer Warm - Fresh Food Normal (Diagnostic Chart) . . . . . . . . . . . . . . . . . . 40
Fresh Food Warm - Freezer Normal (Diagnostic Chart) . . . . . . . . . . . . . . . . . . 41
Fresh Food Too Cold - Freezer Normal (Diagnostic Chart) . . . . . . . . . . . . . . . 42
Refrigerator Dead - No Sound, No Cooling (Diagnostic Chart) . . . . . . . . . . . . 43
Evaporator Fan Not Running (Diagnostic Chart) . . . . . . . . . . . . . . . . . . . . . . . 44
Condenser Fan Not Running (Diagnostic Chart) . . . . . . . . . . . . . . . . . . . . . . . . 45
Damper Door Not Operating (Diagnostic Chart) . . . . . . . . . . . . . . . . . . . . . . . . 46
Compressor Not Running (Diagnostic Chart) . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Heavy Frost On Evaporator (Diagnostic Chart) . . . . . . . . . . . . . . . . . . . . . . . . . 48
Thermistor Values (Table 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Efficient Use of Diagnostics
For most efficient use of the diagnostics, find the appropriate diagnostic chart and proceed as directed
in the chart. When directed to take a thermistor reading, refer to Table 2, Thermistor Values.