LCD shows P1 - Abnormality of room temperature thermistor

What does P1 mean?

The remote controller LCD displays 'P1', indicating an abnormality with the room temperature thermistor (TH1).

• Room temperature thermistor (TH1) malfunction.
• Loose or disconnected thermistor wiring.

Click steps to track your progress.

1. 1

   Check if the thermistor is properly connected to the indoor unit's control board.

2. 2

   Ensure the thermistor is not physically damaged or obstructed.

3. 3

   If accessible, measure the resistance of the thermistor to verify its functionality (consult service manual for values).