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hello
vaillant turbomax plus gives no hot water randomly and heating is also off at these times ( can not be turned on ). When water is hot it runs cold then hot again( but not always) from same tap, while filling bath or sink.
Error code checking from display shows last code as 'nnn' this maybe a red herring ?
ps
warm start light flashing during fault sometimes
vaillant turbomax plus gives no hot water randomly and heating is also off at these times ( can not be turned on ). When water is hot it runs cold then hot again( but not always) from same tap, while filling bath or sink.
Error code checking from display shows last code as 'nnn' this maybe a red herring ?
ps
warm start light flashing during fault sometimes