A103 - Lower heater temperature sensor failure

What does A103 mean?

The temperature sensor for the lower heating element has malfunctioned, disabling the heater. The unit cannot accurately measure the temperature in the lower part of the tank.

• Failed lower heater temperature sensor
• Wiring issue to the sensor

Click steps to track your progress.

1. 1

   Verify the sensor and its wiring are properly connected.

2. 2

   Check the resistance of the sensor using a multimeter against the Ohm chart.

3. 3

   If resistance is incorrect, replace the sensor.