the pump stays on after the heating has switched off?
Problem after changing ch pump on a grundfos pump plan?
I have hot water overflowing into the loft expansion tank?
grundfos MK 2 15/50 x 18 playing me for a fool?
Problem refilling CH system after fitting Grundfos 15-50 130 selectric pum?
my grundfix selectric wont stop pumping?
The pump appears to be operating when central heating is not on?
Grundfos Selectric UPS 15-50 pump?
water is filling the header & expansion tank via the feed pipe to the pump?