Hybrid Heater Codes

Rheem · ProTerra 120V plug-in

Rheem ProTerra 120V plug-in error code A107

Water Detected on Floor: Check For Leaks

What it means

Water is detected in the drain pan

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. Check for obvious water leaks (If leak is present, service for unit leakage). 2. If obvious leakage is not present, disconnect rope sensor from the board and if the code is no longer present, dry (a blow dryer is an acceptable method) or replace rope sensor. 3. If error is still present once the rope sensor has been replaced, the board will need to be replaced. 4. Press and hold the "Clear Alarm" button for 5 seconds to override the alarm for 24 hrs.

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