BoilerFaultCodesYour boiler's hot water sensor has developed an electrical fault, meaning the system cannot tell how hot your water is and has stopped heating it 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: Short circuit DHW temperature sensor
What causes this fault?
This fault occurs when the domestic hot water sensor's electrical circuit is interrupted by a short, preventing the boiler from reading the water temperature. The most common reason is that the sensor's internal components have failed over time, though it can also be caused by water leaking onto the electrical connections or a damaged wire touching the boiler's metal casing.
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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