BoilerFaultCodesYour boiler has shut down because its internal temperature got too hot, likely due to a circulation problem or a blockage.
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 exceeded
What causes this fault?
This fault occurs when the water inside the boiler reaches an unsafe temperature, causing the system to shut down to prevent damage. The most common reason is that water isn't moving through the unit quickly enough, often due to a pump failure, a build-up of sludge, or air trapped in the heat exchanger.
This issue often surfaces when the heating is first turned on after summer, as the internal pump can seize up after long periods of inactivity.
DIY fix possible
Check that your main gas valve is fully open and you have credit on your meter.Verify that all radiator valves are open and that there is enough water pressure on the boiler gauge (target 1.5 bar).Press the Reset button for two seconds to see if the boiler restarts.
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E01 — no call-out fees, no surprises.
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Remeha Avanta Plus 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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