BoilerFaultCodesWhat the manual says
Manufacturer manualOperation mode permanent
What causes this fault?
This code appears when the boiler's internal service or manual override mode has been activated, telling the unit to ignore external thermostats. It often happens if a setting was accidentally changed during a service or if the control dial was left in the ‘on’ position rather than being set to follow your timer. Because the boiler is receiving a permanent 'run' signal, it will continue to heat until you manually switch it back to its automatic mode.
DIY fix possible
Locate the main control dial on the front of the boiler.Turn the dial away from the maximum 'permanent on' setting to a lower number or your desired temperature.Check your external thermostat or programmer to ensure it is now back in control of the heating.
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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All 365 fault codes on the Greenstar CDi Compact
Seeing a different code? Every code this model can display, in one place.