What does H91 mean?

The overload protector (OLP) for the tank heater has tripped or is disconnected. Protection control is activated after 60 seconds of detection.

• Tank heater OLP has tripped (activated).
• Tank heater OLP is disconnected.

Click steps to track your progress.

1. 1

   Check if the tank heater OLP has been activated.

2. 2

   Ensure the tank heater OLP is properly connected.

3. 3

   Reset the OLP if it has tripped, following safety guidelines.

4. 4

   If the OLP trips repeatedly, seek professional assistance.