F40 -31 — Pipe temperature sensor shorted or broken

What does F40 -31 mean?

The temperature sensor monitoring the pipe temperature is faulty. It may be shorted, broken, or disconnected, requiring inspection of the sensor and its wiring.

• The pipe temperature sensor is damaged.
• Wiring or connector issue for the sensor.
• Sensor is disconnected.

Click steps to track your progress.

1. 1

   Examine the pipe temperature sensor for any physical damage.

2. 2

   Check the sensor's wiring and connector.

3. 3

   Ensure the sensor is securely in place.

4. 4

   Turn off the unit, unplug it, wait 30 seconds, and plug it back in to reset.