BoilerFaultCodesYour boiler has become too hot and has shut itself down as a safety precaution 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: Boiler overheat error
What causes this fault?
This fault occurs when the water inside the boiler reaches an unsafe temperature, triggering a safety switch to kill the power. The most common reasons are a pump failure that prevents water from moving, or a blockage in the system that stops heat from being carried away from the burner.
This fault is more common in autumn when heating is turned on for the first time after summer, as internal pump parts can seize up from lack of use.
DIY fix possible
Allow the boiler to cool down for 30 minutesCheck that your radiator valves are open and not turned to offPress and hold the 'R' or '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 E110 — no call-out fees, no surprises.
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Baxi Duo-tec/Megaflo 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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