Warning 5207 - Temperature sensor TC1 open circuit

What does 5207 mean?

This warning indicates that the heat carrier outlet temperature sensor TC1 has an open circuit. This means the sensor is not properly connected, its cable is broken, or the sensor itself is faulty.

• Screw terminal for TC1 on the installer module is not properly tightened.
• Heat carrier outlet sensor TC1 or its signal cable is broken.
• Defective installer module.

Click steps to track your progress.

1. 1

   Note the warning code 5207.

2. 2

   Contact a qualified Bosch Heat Pump installer or service technician.

3. 3

   The technician will check the sensor's screw terminal, test the sensor cable, and compare the sensor's resistance to specified values.