What does E13 mean?

The boiler's differential water flow switch indicates that water is flowing when it shouldn't be, or it's stuck in a closed position.

• Faulty water flow switch.
• Debris or blockage causing the switch to remain closed.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the boiler, wait 30 seconds, then turn it back on.

2. 2

   Check if the error code clears.

3. 3

   If the problem persists, a qualified technician should check the water flow switch for proper operation and potential obstructions.