We had one of the above mentioned fitted in June 2000. Almost immediately and quite regularly, it has "locked out." I have found that by turning down the water temperature on the boiler, it behaves rather better, but sometimes in the winter we need a boiler temperature more than 65 C.
My plumber now informs me that it is a PCB fault with this type of boiler of that period and that Potterton have now rectified this fault. He says that he has had to deal with this problem on a regular basis. Apparantly it was a design or manufacturing problem with the first PCBs for this boiler. He also tells me that it will cost about =A3250 to replace this faulty PCB.
Does anyone else have any knowledge of this problem? If it is the case that it was a faulty batch of PCBs then I will take it up with Potterton / Baxi.
Any thoughts or comments most welcome
TIA John.