Error 72 — Compressor Thermistor Error

What does 72 mean?

This error indicates a problem with the compressor temperature thermistor, either a short circuit or an open circuit. The outdoor unit shows no indication.

• Connector connection failure or open cable for the thermistor
• Compressor thermistor failure
• Main PCB failure

Click steps to track your progress.

1. 1

   Check the connector connection for the compressor thermistor and verify that the cable is not open or loose.

2. 2

   If connections are secure, the thermistor itself may be faulty and need to be checked by a technician for proper characteristics.

3. 3

   A technician can also check the voltage of the Main PCB (CN73:1-3 should be 5V) to diagnose Main PCB failure.