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  1. R

    Help needed for Baxi 105 he instant DHW preheat

    Yes, out of interest I refitted the old board making sure the A11 loop had continuity and it still did not work
  2. R

    Help needed for Baxi 105 he instant DHW preheat

    Apologies please ignore. It's turns out I hadn't located connector A11 correctly - now works fine
  3. R

    Help needed for Baxi 105 he instant DHW preheat

    Hi The preheat has stopped working on my boiler. Following the manual I checked continuity across the loop in connector A10 and after finding this ok replaced the pcb part number 248731. The preheat function still does not work. Does anyone know of any other sensors etc that could cause this...
  4. R

    Baxi 105 HE PCB type

    Thanks, I've checked and yes it is a Baxi 105 HE INSTANT. I've found the correct manual and the part code in the manual is 248731. I take it this is right? I've also checked the link in A10 connector and this has continuity so I take it the next step is to change the board?
  5. R

    Baxi 105 HE PCB type

    Hi hopefully someone can clarify what part it is I need. The preheat has stopped working on my boiler and although I could live with this through the summer, I would like to fix it before winter is in full swing. From looking at other posts on this forum I've come to the conclusion that a new...
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