Ok thanks. To be honest it has only ever had a new siemans (I think) PCB and the seperate British gas pump went and was replaced with a new Grundfoss one. It has given us very few problems. Any ideas what would cause this though even just once ayear?
Hello,
Got a Potterton Suprima non condensing installed in 3 bed small semi in 1999. There are 7 rads and a small HW cylinder in the airing cupboard along with the pump and 3 position valve and wiring centre. It is a y plan setup according to the gas engineer who services it every year. The...