Hot water works fine, central heating
very tempremental - sometimes need to run hot water to encourage heating intp life.
pressure seems to remain stable.
However, after reading some of the othe posts in here about combi boilers
could someone clarify the following for me:
1) The expansion tank is not charged, when I try to pump it up, it charges but if I then release some pressure - i get frothy water . Is the tank knackered? It does not release water or air during normal (ie broken) operation of the system.
2) The valve next to this tank is marked 3 bar and will not completely shut off -there is a very slight leak - so slight that use of the bolier drys it up unseen - can this be left or should it be changed?
3)What should the pressure be set at, and should it be done by pumping up the expansion tank or introducing more water using the inlet to the system - this seems to have the same effect.