BoilerFaultCodesWhat the manual says
Manufacturer manualStandby: there is no heat demand from control system.
What causes this fault?
This fault occurs when the boiler's sensors detect a flame or intense heat inside the unit at a time when the gas should be completely shut off. The most common reason is a gas valve that is failing to close fully, allowing a small amount of fuel to continue burning, or a faulty sensor that is incorrectly reporting heat to the main control board.
DIY fix possible
Check your room thermostat or smart controller settings to ensure the target temperature is set higher than the current room temperatureEnsure your heating programmer or timer is set to 'On' for the current time periodVerify that your hot water cylinder thermostat is calling for heat if you have a system boiler
Avoid the next call-out bill
A cover plan would handle faults like 0): no call-out fees, no surprise bills.
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