BoilerFaultCodesYour boiler has become too hot and has automatically shut itself down to prevent damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Safety temperature limiter has tripped due to excessive temperature; requires manual reset.
What causes this fault?
This fault occurs when the water inside the boiler exceeds a safe temperature limit, causing a safety switch to cut the power. The most common reasons are a pump failure that stops water from moving or a buildup of debris that blocks flow through the heat exchanger.
This issue is more frequent when heating is first turned on after summer, as pump components can seize up during long periods of inactivity.
DIY fix possible
Wait for the boiler to cool down completely (at least 20 minutes)Locate the manual reset button, typically found behind the small pull-down door or on the control panelPress the button firmly to reset the safety trip and wait for the boiler to restart
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
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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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