What It Means
Compressor open circuit with no current detected in start or run windings.
Rheem AC & Heat Pump
Rheem AC & Heat Pump Error Code 05
Troubleshooting guide for the Rheem AC & Heat Pump system fault 05.
Possible Causes
- Loss of line voltage to contactor.
- Open thermal overload protector.
- Disconnected compressor wiring.
- Failed compressor internal windings.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis
Open circuit; compressor will not run.
All Recorded Causes
Command for unit operation is present but no current is detected in compressor start and run circuits. Check line voltage, contactor, compressor wiring, overload, and compressor windings.
Verify Before Replacing Parts
- Confirm the exact Rheem model family and ac and heat pump context before acting on a generic code description.
- Verify current draw, overload status, and control signal before condemning the compressor or drive, given that command for unit operation is present but no current is detected in compressor start and r….
- Look for upstream conditions such as airflow or charge issues that may be pushing the compressor into protection, and check check line voltage, contactor, compressor wiring, overload, and compressor windings.
- After the correction, run the system long enough to confirm the ac and heat pump fault does not return under normal load.
Not sure which system this Rheem code is on?
ACLogics has guided diagnostics for 57 Rheem fault codes and asks the right questions to narrow it down.
