Check UL2 Circuit

Electrical failure detected in the Compressor Unloader 2 (UL2) circuit.

Possible causes

Burned out UL2 coil
Solenoid connector with bent pins
Short circuit to ground in wiring
Failed internal controller component

Recommended actions

Check unloader 2 coil ohms
Clean and reseat UL2 connector
Test voltage output from controller
Trace wiring for potential abrasions

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