BoilerFaultCodesYour boiler's main internal computer has developed a fault and is no longer able to control the heating process.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Defective control panel.
What causes this fault?
This fault occurs when the boiler's internal computer chips suffer a hardware failure or a communication breakdown between the various electrical boards. The most common reason is simply age-related wear on the delicate electronic components, though it can sometimes be triggered by an electrical surge or moisture getting onto the circuitry.
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 7A — no call-out fees, no surprises.
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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.
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