BoilerFaultCodesYour boiler's main control panel has lost connection with the internal computer that runs it, meaning the boiler cannot receive commands.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Communication error between fascia and control box – check cables
What causes this fault?
This fault occurs when the data link between the boiler's display screen and the main internal computer is broken or interrupted. The most common reason is a loose or damaged wiring connection inside the casing, though it can also be caused by moisture affecting the delicate electronic circuit boards.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like E46 — no call-out fees, no surprises.
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Keston C36 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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