BoilerFaultCodesWhat the manual says
Manufacturer manualFlame extinguished re-ignition unsuccessful | Gas supply absent or insufficient
What causes this fault?
This fault occurs when the boiler successfully starts but the flame goes out unexpectedly while it is trying to heat your home. The most common reasons are a temporary interruption in your gas supply, a buildup of carbon on the sensing probes, or a failing gas valve that can no longer maintain a steady flow. Essentially, the boiler's safety system steps in because it can no longer detect the heat of a consistent flame.
This fault is more frequent during extreme cold snaps, as sub-zero temperatures can cause external gas regulators to freeze or lead to a drop in local gas pressure.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Avoid the next call-out bill
A cover plan would handle faults like F.29: no call-out fees, no surprise bills.
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