BoilerFaultCodesYour boiler has detected that it is getting too hot inside, often because something is blocking the flow of heat or a sensor is faulty.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flue sensor fault or burner output modulates to maintain temperature set (potential heat exchanger obstruction)
What causes this fault?
This fault occurs when the boiler's internal components reach a temperature that is dangerously high, triggering a safety shutdown to prevent damage. The most common reason is a buildup of limescale or debris inside the heat exchanger, which restricts water flow and prevents heat from being transferred away from the burner effectively.
This fault often becomes apparent during the first cold snap of winter when the boiler is suddenly required to run at a higher output for longer periods.
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 130 — 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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