HEX: AB - Overheat sensor interruption

Fault Details:

• The overheat sensor is interrupted or shorted to supply voltage (UB).

Recommended Solution:

1. Perform an electrical check of the overheat sensor.

2. Visually inspect the unit, seal, threads, cables, and connections to ensure they are undamaged and fully seated.

3. Check electrical continuity.

4. Make sure no debris is on or around the sensor. Do not use compressed air to clean it.

Note: Fault code meanings can vary depending on the model and controller. If you’re unsure, contact Heatso directly.