BoilerFaultCodesYour boiler has lost power to a key internal safety part due to an electrical fault, meaning it cannot safely ignite to provide heating or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: The fuse F2 in the control panel is blown, caused by a short-circuit in the gas valve-circuit. Check the electrical connection of the gas valve for a proper functioning.
What causes this fault?
This fault occurs when an electrical component inside the boiler fails, causing a surge that blows a specific safety fuse on the main control board. The root cause is typically a short circuit within the gas valve's internal wiring, which prevents the boiler from safely controlling the fuel flow.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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 22 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Ideal Maximiser SE 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.