Blue light Off, Reset button Off — No power to control board

What does Blue light Off, Reset button Off mean?

The boiler's main blue indicator light and the reset button are both off, indicating a complete lack of power to the control board. This means the boiler cannot operate or respond.

• No permanent mains supply to the boiler
• Boiler mains switch is off
• Blown fuse (F1 2.5A or F3 0.5A)
• Faulty transformer or control board

Click steps to track your progress.

1. 1

   Check that the boiler's main power switch is in the 'On' position.

2. 2

   Verify the mains electricity supply to the boiler is active (e.g., check house circuit breakers).

3. 3

   Inspect the fuses for the boiler (F1 2.5A or F3 0.5A) and replace if blown, referring to page 44 for fuse location.

4. 4

   If power remains off, contact a qualified technician as the transformer or control board may need checking.