Alarm Pool temperature sensor TP1 faulty

What does 5236 mean?

The Heat Pump has detected a fault with the pool temperature sensor (TP1). This alarm indicates the sensor or its signal cable has either failed or short-circuited after multiple warnings.

• Faulty pool temperature sensor TP1 or its signal cable.
• Loose screw terminal connection for the sensor TP1 on the I/O board.
• Short circuit in the sensor TP1 or its signal cable.
• Internal I/O board malfunction.

Click steps to track your progress.

1. 1

   Visually inspect the pool temperature sensor TP1's cable and its connection point to the Heat Pump for any signs of damage or dislodgement.

2. 2

   Ensure that any accessible screw terminals for sensor TP1 on the control board are snug (do not overtighten).

3. 3

   Power cycle your Heat Pump by turning off the dedicated circuit breaker for at least 30 seconds, then turning it back on.

4. 4

   If the alarm persists, contact a qualified Bosch service technician for further diagnosis and repair.