BoilerFaultCodesYour boiler's main control screens are having trouble talking to each other, which means the boiler doesn't know what settings you are asking for.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: User interface or distant control panel fault
What causes this fault?
This fault occurs when the communication link between the boiler's internal computer and the front display panel is broken. It is usually caused by a loose connection cable or internal electrical wear on one of the circuit boards, which prevents your instructions from reaching the burner.
DIY fix possible
Turn off the electrical power supply to the boiler at the fused spur switch.Wait approximately 60 seconds for the electronics to fully discharge.Turn the power back on to see if the communication link resets.
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 12 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Glow-worm 18si 24ci 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.