Err: BT25 125 — Heating medium supply (external) sensor fault

What does Err: BT25 125 mean?

This error relates to the heating medium supply (external) sensor (BT25). Causes could be open/short circuits or a defective sensor. Additional heating might be blocked.

• Open-circuit or short-circuit on sensor input
• Defective heating medium supply (external) sensor
• Additional heat is blocked

Click steps to track your progress.

1. 1

   Check the connections for the external heating medium supply sensor.

2. 2

   Inspect the sensor for any damage.

3. 3

   This alarm should reset automatically when the cause is resolved.

4. 4

   If the service technician symbol persists, contact your installer.