As I stated my system was functional until recently. I had not changed anything before it went wrong so wiring was still correct. Following advice and to rule out anything, I have disconnected everything, checked wire for wire unit by unit. I then ran the test again but still could not get...
My heating and water boiler was replaced about 3 years ago and has been running fine until recently, when I am unable to run both at the same time. separately both work fine, if I switch on the HW then CH it will stay in the HW position, if I switch on CH then HW it will go to the CH position...
I have a metal soil pipe from the toilet going down the side of the house and joins onto a clay pipe just below ground level. Unfortunately when breaking up a concrete path I can now see a crack in the collar of the clay pipe. What is the best way to solve this. Any advise would be appreciated...