Hi Mick - thanks for the reply.
Yes, terminal 1 has a single blue wire with a red sleeve (not sure if the colours are relevant to you).
Terminal 2: Nothing
Terminal 3 = Yellow(ish)
Terminal 4 = Red
Terminal 5 = One red and one blue with a red sleeve
It is difficult to see where each...
.....or just me being stupid?
Potterton Prima F80 boiler
Potterton EP3002 programmer
Fully pumped (not sealed), 3 way valve, separate CH and HW stats.
Been in the house about a year and although the CH and HW programmer (EP3002) seemed to behave strangely when we moved in it wasn't top...