BoilerFaultCodesWhat the manual says
Manufacturer manualPILOT LIT BUT NO MAINS GAS
What causes this fault?
This fault occurs when the boiler successfully lights its small pilot flame, but the main burner fails to catch light to start heating your home. This is usually caused by a blockage in the pilot injector that prevents the flame from reaching the sensor, or a mechanical failure within the gas valve that stops the main flow of fuel.
This issue often surfaces during the first cold spell of autumn when the boiler is asked to work harder after sitting idle over the summer months.
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 51: no call-out fees, no surprise bills.
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