BoilerFaultCodesWhat the manual says
Manufacturer manualMaximum load test program error
Shared across the 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
Press and hold the 'Reset' button (indicated by a flame with a line through it) for five seconds.Turn the boiler off at the main electrical isolation switch, wait 30 seconds, and turn it back on.Wait for the boiler to complete its startup sequence to see if it returns to normal operation.
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