noisy boiler and pump

[cliverm1954]

hi all,
i drained my system down to fit new lockshield vales c/w drain points to all of our lower radiators, upon refilling the pump is noisy and so is the boiler. we have a thorn apollo 15/30b on a vented system with flowshare valve. when the pump and boiler shuts down you can hear water gurgling back into the boiler, does this mean an air lock possibly or a blockage ???

 

[bengasman]

Gurgling noise sounds like air somewhere.
Aav would do the job probably. Or pump possibly on its last legs.

 

[cliverm1954]

thanks bengasman
the pump is brand new, will check for trapped air pocket, i take it that that trapped air would also cause the boiler to overheat and trip the overheat causing the pilot to go out on a high heat setting ?????

 

[bengasman]

It would.