BoilerFaultCodesYour boiler has lost communication with its external control unit or thermostat, meaning it cannot receive the correct instructions to heat your home.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Kontaktfehler oder Störung im Regler
What causes this fault?
This fault occurs when the electrical connection between the boiler's main brain and the external temperature controls is interrupted. The most common reason is a loose or damaged communication wire, but it can also be caused by the external controller itself failing due to age or an internal electronic glitch.
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 AC — no call-out fees, no surprises.
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Worcester Bosch TA 211 E 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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