BoilerFaultCodesWhat the manual says
Manufacturer manualVolatile lockout
What causes this fault?
This fault occurs when the boiler's internal computer detects a critical failure during the ignition process or a sudden loss of flame during operation. The most common reasons are worn-out ignition components failing to spark or the gas valve not delivering the correct amount of fuel to the burner.
This fault is slightly more common in winter, as cold weather can put additional strain on aging ignition components and gas valves.
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 Fast flash, Lockout reset: Off: no call-out fees, no surprise bills.
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