Boiler fails to operate

What does No display code mean?

The boiler is not starting up or providing heat, and no specific fault code is displayed. This indicates a general operational issue that requires basic checks before consulting specific fault codes.

• Gas supply turned off.
• Insufficient water in the heating system.
• Electrical supply switched off.
• Control knob in off position or at its lowest setting.

Click steps to track your progress.

1. 1

   Check that the gas supply to the boiler is fully turned on.

2. 2

   Verify that the electrical supply switch for the boiler is in the 'on' position.

3. 3

   Ensure the heating system has enough water by checking the pressure gauge and topping up if necessary.

4. 4

   Confirm that the main control knob on the boiler is in an operating position, not turned off or at its lowest setting.

5. 5

   If these checks don't resolve the issue, and especially if repeated attempts to ignite fail, then consult the fault code section (F.28, F.29).