Hi , do you have a cylinder stat?
Hi , not around till about 4pm today. But could you check if you have a motorised valve and if its a two pipe or three pipe
It GATS a 3 port
That's a 3 port/ pipe
Hi , is the pump on the boiler itself? Also could you tell me the make of your programmer? Thanks . also do you have or can you borrow a multimeter?
Testing whether a wire is live in the wiring centre. Without one though , if you take off the programmer front cover and with the power off take out wire 1 and tape it up. Replace the programmer front and see if this stops hot water being on all the time