What the manual says
Manufacturer manualActivation of the chimney sweep function at maximum DHW output
Shared across the Basica Cond range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
DIY fix possible
Wait approximately 15 minutes for the test to time out automaticallyTurn the selector knob to the 'Reset' position and then back to your desired settingSwitch the boiler off and on again at the fused spur switch
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Related fault codes
All 39 fault codes on the Basica Combi
Seeing a different code? Every code this model can display, in one place.