E9 219 — Safety sensor fault or temperature too high

What does E9 219 mean?

A safety sensor fault has occurred, indicating that the temperature is too high or the sensor has a short circuit or open circuit. This is a safety mechanism to prevent damage.

• Faulty safety temperature sensor.
• sensor short circuit or open circuit.
• System overheating.
• Restricted water flow.

Click steps to track your progress.

1. 1

   Turn off the boiler at the mains and allow it to cool down completely.

2. 2

   Check the boiler pressure and top up if it is low.

3. 3

   Reset the boiler. If the fault persists, contact a Gas Safe registered engineer to check the safety sensor and system.