DC — Short circuit on room temperature sensor (heating circuit 3 with mixing valve)

What does DC mean?

The boiler is operating without room temperature influence for heating circuit 3 (with a mixing valve) due to a short circuit in its room temperature sensor.

• Short circuit in the room temperature sensor for heating circuit 3
• Damaged wiring to the room temperature sensor

Click steps to track your progress.

1. 1

   Visually inspect the room temperature sensor for heating circuit 3 for any visible damage or corrosion.

2. 2

   Check the connecting cables of the room temperature sensor for any signs of fraying or shorting.

3. 3

   Contact a qualified heating technician to test or replace the room temperature sensor.