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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...