i have a problem with my Vokera 20/80 flowmatic boiler. in the service manual it says that the air release valve on top of the Dhw heat exchanger should be left open one full turn. when i did this water started to come out so i shut it again. i have bled all my radiators but still have problems getting my radiators to heat up. i would be grateful for any help.
is the pressure guage on the front reading less than 0.5 bar ? if so you need to top up the pressure let me know if you need any more help cheers ( i am a heating engineer )