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Troubleshooting Rheem Heat Pump Error A004: Compressor Shutdown - Discharge-Suction Trip

Updated: Nov 24

Troubleshooting Rheem Heat Pump Error Code A004
Rheem Hybrid Heat Pump Error Code A004

Rheem Heat Pump Error A004 indicates that the heating system switches to using elements because of a potential compressor issue.


To troubleshoot this problem, follow these step:


  1. Ensure the fan is working while the compressor is running.

    1. If the fan isn't operational, check continuity from the middle (ground) terminal to either outside terminal.

    2. A reading of 120V or higher indicates the fan should be running and may need replacement. If not, consider replacing the control board though this is rare.

  2. Make sure the filter screen is clean.

  3. Inspect compressor and surrounding components for any signs of a refrigerant leak, such as oily residue.

    1. If the compressor isn't working or there are signs of leakage, the unit may need to be replaced as we do not service sealed system parts.

  4. If you are in Santa Clara County, Alameda County or San Mateo County, contact Amor Plumbing via our web service request, call or SMS chat us at 408-649-3129 (please be sure to include your model and serial number information).

  5. or Contact your local Authorized Rheem Service provider to schedule service, repairs, replacements or installation of a Rheem Hybrid Heat Pump.


If you are uncertain about the coverage of your hybrid warranty for your Rheem heat pump water heater, contact Rheem Hybrid Technical Services Department at 800-995-0982.



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