Automatic air vent leaking

[IrinaPri]

Dear professionals, could someone kindly advise on per below issue, please let me know if more pictures or details needed. I think my Auto Air Vent is now leaking. A little background on the boiler – installed a year ago in Feb, Valiant Heat only boiler Eco Tec plus 424, plus new pump. The leak is only on the right hand side vent, some water descale is visible, but the left hand side one is completely clean. The leak itself is mostly everyday, sometimes quite a lot of water comes out, the water itself is very smelly, like drain smell. Could someone kindly let me know what the issue is, I’m worried to call someone in without knowing what the problem is as last year boiler installation was a nightmare, the gentleman didn’t know what to do with Fault 23 on the new boiler so I posted on here and only after reading the replies he managed to work it out.

Thank you in advance for your time!

Irina

 

[ShaunCorbs]

Is the black plastic screw cap shut if it’s not screw it in

 

[IrinaPri]

Is the black plastic screw cap shut if it’s not screw it in

Dear Shaun, thank you for your reply.
Not sure to be honest, i cant get all the way in to see it properly, can only take pics from above. Could you please tell me how do i check the cap is shut? i think there is a small gap between black cap and metal part, the clean valve on the left hand side also has small gap (pic attached).

 

[ShaunCorbs]

Should just screw in

 

[IrinaPri]

Should just screw in

Thank you Shaun, I will try shortly and update

 

[IrinaPri]

Should just screw in

update- I checked and it was screwed in all the way. I can loosen it if this will help?

 

[ShaunCorbs]

update- I checked and it was screwed in all the way. I can loosen it if this will help?

No will leak more if undo best to get it changed

 

[IrinaPri]

No will leak more if undo best to get it changed

Understood, will order the part, is it something I can maybe do myself or better get someone in?
Thank you for your help!