BoilerFaultCodesYour boiler has sensed that the hot water is getting too hot and has shut down as a safety precaution.
This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.
Technical description: Temperature too high during DHW demand.
What causes this fault?
This fault occurs when the boiler's internal sensors detect that the domestic hot water has reached an unsafely high temperature. The most common reasons are a buildup of limescale inside the heat exchanger restricting water flow, or a faulty sensor that is sending incorrect temperature readings to the main control board.
This issue often becomes more apparent in summer when the incoming mains water is naturally warmer, making it easier for the boiler to exceed its maximum temperature limit.
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 F002 — no call-out fees, no surprises.
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