E2 222 — Flow sensor short circuit

What does E2 222 mean?

The flow temperature sensor contacts are short-circuited. This means the sensor is sending an incorrect or constant signal, which affects the boiler's ability to regulate temperature.

• Short circuit within the flow temperature sensor.
• Damaged sensor wiring.
• Water ingress affecting the sensor or wiring.

Click steps to track your progress.

1. 1

   Power cycle the boiler by turning off the main power for 30 seconds, then restart it.

2. 2

   Visually inspect the flow temperature sensor and its connections for any signs of damage or moisture.

3. 3

   If the error persists, contact a qualified heating engineer to diagnose and replace the sensor if needed.