I went to boost my heating a moment ago and nothing happened. There's no sound from the motorised valve (I have a pair of 2-port valves) and the boiler doesn't fire. Hot water works fine.
I've followed the advice in FAQ No. 10 to manually operate the valve and heat water, this has warmed up...
How does air enter a pressurised system?
The towel rail in my 2nd storey loft needs bleeding daily. I'm baffled and can't figure out how air enters a system that is under pressure. There must be an answer!
FYI, boiler on ground floor. No air anywhere else.