Truma combi 4e noisy

[kingsontheroad]

Hi all
Got a brand new truma 4e combi fitted to our van. Works great for hot water on gas and electric no problem but when we turn on heating it's like a plane taking off! Very noisy. Even on comfort setting. Any ideas?

 

[f6c]

Take it back to the installer

 

[Just smiffy]

As above, mine is silent….