BoilerFaultCodesYour boiler has shut down because it has detected that the water inside has become dangerously hot.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Safety thermostat intervention from dual sensor – excessive heating occuring due to any failure during normal operation, try resetting the boiler.
What causes this fault?
This fault occurs when the internal water temperature rises too rapidly or exceeds safe limits, triggering a safety sensor to shut the system down to prevent damage. The most common reasons are a pump failure that stops water from moving or a blockage in the heat exchanger that traps heat inside the unit.
This issue is more frequent during the first cold spell of autumn when pumps that have been idle all summer often seize up upon restarting.
DIY fix possible
Check that your radiator valves are open to allow water to flow.Ensure your system water pressure is between 1.0 and 1.5 bar.Press and hold the 'R' or Reset button for a few seconds to restart the boiler.
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A boiler cover plan would cover faults like rE07 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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