BoilerFaultCodesYour boiler has detected a problem with the hot water system, meaning you likely have no hot water even if your heating still works.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: DHW fault
What causes this fault?
This fault occurs when the boiler's internal computer receives an incorrect or missing signal from the temperature sensors responsible for your hot water. The most common reason is that the domestic hot water sensor has failed or become corroded, preventing the boiler from knowing how hot the water is and causing it to shut down the hot water function as a safety precaution.
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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