i have recently drained water from my system, but when i opened up the taps to empty the system for some reason i opened the hot water tap as well. Now i can only get my hot water to be luke warm when running. The flame on the boiler comes on and stays on but the water remains cold. I think that i have released the air pressure from the system and was wondering if there is any way to vent the system to put the pressure back in, i have tried increasing the bar pressure but it makes no difference, hopefully somebody can help me as a cold shower is killing me in the mornings. thanks
