What does F63 mean?

An internal error has occurred with the boiler's electronics, specifically the EEPROM memory. This often points to a problem with the main circuit board.

• Incorrect polarity on incoming mains
• PCB fault

Click steps to track your progress.

1. 1

   Check the polarity on the incoming mains power supply (contact a technician).

2. 2

   If the polarity is correct, the PCB may be faulty (contact a technician).

3. 3

   If the issue persists, a qualified technician should inspect the boiler.