BoilerFaultCodesYour boiler has detected an inconsistent flame, which is often caused by a temporary interruption in the gas supply or a slight blockage in the air vent.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Temporary mis-burning error – could be due to a gas pressure or flue line issue.
What causes this fault?
This fault occurs when the boiler's internal sensor detects that the flame is flickering or unstable rather than burning steadily. The most common reason is a temporary disruption in the balance of gas and air, which prevents the boiler from maintaining a safe and consistent heat output.
This issue can sometimes appear during very windy weather, as strong gusts can occasionally interfere with the air pressure entering the flue pipe.
DIY fix possible
Press the Reset button on the control panel to clear the temporary faultCheck if other gas appliances, like a hob, are working to ensure gas is being suppliedInspect the external flue pipe to ensure it is not obstructed by leaves or debris
Find a Gas Safe engineer
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A boiler cover plan would cover faults like E83 — 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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