BoilerFaultCodesYour boiler's main internal computer has developed a communication or electronic fault, causing the system to stop working for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Internal control unit error
What causes this fault?
This fault occurs when the boiler's main control board loses the ability to communicate with the internal components that manage the flame. The most common reason is an electronic failure within the circuit board itself, though it can also be triggered by faulty ignition wiring failing to send the correct signals back to the computer.
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.
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A boiler cover plan would cover faults like E36 — no call-out fees, no surprises.
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