Your boiler is simply letting you know that the 'Reset' button was pressed for too long or by accident.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Reset button pressed by mistake.
What causes this fault?
This fault occurs when the reset button on the control panel is held down for more than 15 seconds, which the boiler interprets as an accidental press. It is often triggered by a homeowner attempting to clear a previous error or by something leaning against the control panel. Once the button is released and the error is cleared, the system should resume normal operation immediately.
DIY fix possible
Press the Reset button once more briefly to clear the code.If the code remains, switch the power to the boiler off at the fused spur switch.Wait 30 seconds and switch the power back on.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Fd — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Worcester Bosch Greenstar 25 HE Combi is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.