What the manual says
Manufacturer manualON BOARD CLOCK DAMAGED
Shared across the Pinnacle 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
Turn the boiler power off at the fused spur switch for 30 secondsTurn the power back on to see if the error clearsSwitch the boiler to 'Manual' mode to bypass the clock and restore heat
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Related fault codes
All 55 fault codes on the Pinnacle Combi
Seeing a different code? Every code this model can display, in one place.