I have a Vokera Excell 80sp combi boiler. For the last couple of days the hot water has been firing up initially when the tap's turned on and then running cold. I checked the pressure gauge and it was at zero so i topped up the boiler using the filler loop, which seemed to get the pressure back up ok, though I had to keep the valve open a little longer than expected to get it up to 1 bar. Trouble is, i then tested the hot water there is now no water at all coming out of the hot taps (not even cold). I don't know why this would be - any ideas?
Vokera Excell 80sp no hot water
You've turned the cold feed off to the boiler.