Your boiler has been put into a temporary reset mode because the button was held down too long or pressed accidentally.

Reset button pressed by mistake.

What causes this fault?

This code appears when the reset button on the control panel has been pressed for more than 15 seconds or caught accidentally. It is a safety feature that puts the boiler into a temporary pause to prevent the internal software from becoming confused by constant reset signals. Once the system finishes its internal check, the code should clear automatically without any further action required.