grant baxi back boiler noise

[bigmaac antrim]

I have just moved into a house with a grant baxi back boiler in the coal fire and oil link up. approx 20 year old system

I have tried 2 plumbers but am stuck.

The problem is when i pull the damper on the back boiler to put the heat to the rads you can hear what sounds like air bubbling in the back boiler, it doesnt stop when the pump is running. its loud enough to interrupt conversation but its different to the normal noise if eg the pump wasnt working which wud make loud banging noises. Any ideas. Help pls

 

[Dotty]

Knowing what the majority of the link ups are like over here it's been piped up incorrectly. You need the system piped up correctly.

You most certainly need someone in to look at it, preferably one with both HETAS and OFTEC.