Baxi 105E hot water intermittent fault. 30 and 50 lights flashing

[stanna58]

Ow Doo Chaps,

As described the fault occurs when turning on hot tap and is cured by a reset but can take several attempts. Happening once per day (ave) but seems to be getting more frequent. CH is fine.
Sorry its happening with CH as well. Only just tried that ha ha

Flue has been checked recently and all clear and fan appears to spin ok.
Anyway of checking its definitely the PCB via multimeter or other means.

Thanks

 

[ianmcd]

2 lights flashing at the same time is always PCB with that boiler

 

[stanna58]

Thanks was hoping not but not that lucky. Anyone any idea which component its likely to be like a relay or something with it being intermittent.
Board parts are dirt cheap compared to a new board.

 

[CBW]

Thanks was hoping not but not that lucky. Anyone any idea which component its likely to be like a relay or something with it being intermittent.
Board parts are dirt cheap compared to a new board.

Probably best you ask in the cc as that’s a closed forum.