Heat exchanger air vent open

[jrtrrror]

Hi.
Just discovered water dripping from the heat exchanger automatic air vent.
Dripping from the plastic screw head. Should this be open in everyday use or only when filling the system?

Ta

 

[ShaunCorbs]

Only when filling

 

[jrtrrror]

Thanks. So it's ok to screw it up closed?

 

[ShaunCorbs]

Yep

 

[jrtrrror]

Out of interest Shaun corns, would this have caused a pressure loss on the system?

 

[ShaunCorbs]

yes