Hybrid Heater Codes

Rheem · ProTerra 120V plug-in

Rheem ProTerra 120V plug-in error code A005

Compressor Shutdown: Discharge Temp High

What it means

Heating source defaults to elements due to compressor malfunction

Source: Residential 120V plugin Heat Pump Water Heater (Dedicated Circuit) Use & Care Manual, AP21914 Rev 02, page 30

Also listed in: Residential 120V Plugin With HydroBoost Heat Pump Water Heater (Shared Circuit) Use & Care Manual, AP22654 Rev 01, page 30

What Rheem says to do

These steps involve electrical testing or parts replacement. Rheem's manuals tell owners to leave that work to a qualified service technician.

1. Confirm fan is operational while compressor is on. (If the fan is not operational, check continuity from middle(ground)terminal to either outside terminal. If there is a 60V or higher reading, the fan should be running and will need to be replaced. If not, replace the control board (rare)). 2. Confirm filter screen is clean. 3. Inspect compressor and surrounding components for any obvious signs of refrigerant leak (oily residue) If the compressor is not operational or there are signs of leakage, the unit will need to be replaced as we do not service sealed system parts.

Last checked 2026-10-03.

Safety first

From the manufacturer's manual for this series.

The same code on other models

Codes mean different things on different heaters. Match the series to the model number on your rating label.

Other ProTerra 120V plug-in codes