Rheem Water Heater Error Code A105 [Causes and Fixes]

Rheem Water Heater Error Code A105 [Causes and Fixes]

The A105 code shows when the Rheem water heater has a temperature malfunction of the heat pump. Faulty wiring can cause the thermostat to fail, overheating the system and showing the error. A faulty thermostat will also fail to detect the operating temperature of the system properly and leads to A105.