I had to drain the water from my central heating system and since
refilling, I cannot get the combi boiler to work. I think the noise I
can hear is air preventing the pump from circulating the water.
Consequently, the boiler does not light.
The combi boiler is installed higher than the radiators on the first
floor. I've tried venting the pump but only a tiny amount of air is
expelled and not enough to fix the problem. All radiators have been
blead as well.
It's pretty cold in here right now so would appreciate any
help/suggestions people can offer.