BoilerFaultCodesWhat the manual says
Manufacturer manualSafety time to establish flame exceeded
What causes this fault?
This fault occurs when the boiler's control system attempts to light the burner but cannot detect a stable flame. The most common reasons are a temporary interruption in the gas supply, an ignition electrode that is too dirty to spark, or a blockage in the pipe that carries away waste water.
This fault is particularly common during freezing winter temperatures, as the external condensation pipe can freeze solid and prevent the boiler from firing.
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 133: no call-out fees, no surprise bills.
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