BoilerFaultCodesYour boiler has shut itself down because it has become too hot or failed to light the flame correctly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Appliance does not ignite. Safety temperature device activated.
What causes this fault?
This fault occurs when the boiler's internal sensors detect that the water inside has reached a dangerously high temperature or the burner has failed to light after several attempts. Common reasons include a pump failure preventing heat from moving away from the boiler, or worn-out ignition components that can no longer create a reliable flame.
This issue often surfaces during the first cold snap of autumn when a pump that has been idle all summer fails to start, causing the unit to overheat immediately.
DIY fix possible
Check if your gas prepay meter has creditEnsure other gas appliances like a hob are workingPress and hold the reset button for five seconds
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Warning lamp blinks — no call-out fees, no surprises.
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Worcester Bosch WR325 RSF is discontinued — time for a new one?
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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