Warning Z1 5214 - Inlet temperature sensor TC0 short circuit

What does 5214 mean?

This warning indicates that the heat carrier return sensor TC0 has a short circuit. This typically means there's an electrical short within the sensor or its connecting cable.

• Heat carrier return sensor TC0 or its signal cable is shorted.
• Defective installer board.

Click steps to track your progress.

1. 1

   Note the warning code 5214.

2. 2

   Contact a qualified Bosch Heat Pump installer or service technician.

3. 3

   The technician will measure the sensor's resistance, inspect the cable for a short, and if necessary, replace the sensor or repair the cable.