sensor fault EM1-BT52 — Boiler temperature sensor not connected or defective

What does 35 mean?

The EM1-BT52 sensor, which measures boiler temperature, is not connected or defective. This causes the shunt to close and the burner to shut down.

• EM1-BT52 sensor is disconnected or has a loose connection.
• The sensor unit itself is faulty or damaged.
• Wiring issues leading to the sensor.

Click steps to track your progress.

1. 1

   Turn off the Heat Pump and any connected boiler system at their main power supplies.

2. 2

   Carefully check the connections to the EM1-BT52 sensor for tightness and integrity.

3. 3

   Inspect the sensor for any physical damage.

4. 4

   Restore power and observe if the alarm clears and the system resumes normal operation.

5. 5

   If the fault persists, contact a qualified service technician for diagnosis and repair.