What does A009 mean?

There may be an issue with the compressor's wiring, causing it to shut down. The unit is defaulting to the electric elements for heating.

• Faulty compressor wiring
• Faulty temperature sensor

Click steps to track your progress.

1. 1

   Verify all wiring and sensor connections are secure.

2. 2

   Test the resistance of the thermistors with a multimeter, referring to the Ohm chart for correct values.

3. 3

   Check the sensor readings on the unit's display (Service > Sensors) for abnormal values like -40°F or +250°F.