I am regualy having to top up my system through the boiler,maybe every 3..4 days not much but the preasure is under the number 1 mark,and when boiler is heating there is a boiling, rushing niose, but no sign of leaks anywhere in the pipes or radiators, would i have to bleed the combi boiler?? if yes how??? combi icon23t

Ian Coulson, March 2009