I have a conventional CH system, A potterton prima boiler, 7 rads, HW cylinder.
When the system kicks in I get a "glug, glug, hisssssss " noise coming from the boiler this seems to continue for a while the tends to settle down, I have regularly bled all rads during the winter CH months, I even manually operate the auto air valve, I have loaded the system with the appropriate chemicals, I have bled the pump. This has been going on for about a year now I now need help, have I missed something?. Listening to this noise close up to the boiler it sounds like water is struggling to get to the heat exchangers in the boiler.
Can anyone advise me please.
regards
When the system kicks in I get a "glug, glug, hisssssss " noise coming from the boiler this seems to continue for a while the tends to settle down, I have regularly bled all rads during the winter CH months, I even manually operate the auto air valve, I have loaded the system with the appropriate chemicals, I have bled the pump. This has been going on for about a year now I now need help, have I missed something?. Listening to this noise close up to the boiler it sounds like water is struggling to get to the heat exchangers in the boiler.
Can anyone advise me please.
regards