Alde wet heating, bit gargling after antifreeze change

[Charlie9038]

Had antifreeze change few months ago, on alde wet system, not had heating on in since until a trip to wales last week, noticed it’s gargling, could it be an air lock, should I take it back to the dealer that did it or will it pass through with use?

Thanks

 

[Sundowners]

Check level first

 

[TheMachMan]

Then might need bleeding.

 

[thebriars]

Check the pump is not still set on the purge level. This will give exactly the sort of noise you mention, a bumping sound from the expansion chamber.