BoilerFaultCodesYour boiler has detected an internal electrical problem with the component that controls the gas supply, causing the system to shut down 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: Gas valve or control box error – gas valve coils need checking
What causes this fault?
This fault occurs when the boiler's main computer loses reliable communication with the gas valve, which is the component responsible for releasing fuel into the burner. The most common reason is an internal electrical failure within the valve's coils or a fault on the circuit board that prevents it from sending the correct voltage to start the heating process.
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 F0238 — no call-out fees, no surprises.
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Worcester Bosch CDi Classic 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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