BoilerFaultCodesYour boiler has detected a fault with the temperature sensor for your hot water, which means it cannot safely heat the water for your taps.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: DHW sensor short circuit. Check cable/connections not damaged. Renew DHW cable/sensor assy. Part No. 5106290
What causes this fault?
This fault occurs when the electrical circuit for the hot water temperature sensor is interrupted, usually by water ingress or internal component failure. The most common reason is that the sensor's internal insulation has broken down or the connecting wires have become pinched or corroded, leading to an incorrect electrical signal. Because the boiler can no longer monitor how hot the water is, it shuts down as a safety precaution to prevent scalding.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like E08 — no call-out fees, no surprises.
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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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