BoilerFaultCodesYour boiler has sensed a flame inside the system before it was even supposed to start up, causing it to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame detected before burner operation – try resetting the boiler
What causes this fault?
This fault occurs when the boiler's internal sensors detect a flame prematurely, which is a significant safety risk. The most common reason is a faulty gas valve that is leaking fuel into the burner tray or an electrical glitch in the main control board that incorrectly 'sees' a flame that isn't actually there.
DIY fix possible
Locate the reset button on your boiler's control panelPress and hold the reset button for five secondsWait for the boiler to restart and check if the error reappears
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 E1-64 — 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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