FAV making noise but not letting fluid pass

[sbrunthaler]

Hi,

after my car was not driven for app. 5 months, the HFS-3 shows an error.

I checked the nozzle, works fine, and the pump works as well.

There is pressure before the FAV, but the hose after the FAV is dry.

The FAV makes noise, so I guess the valve works but is somehow clogged.

Can it be cleaned or repaired somehow, or do I need a new one?

Thank you!

Regards
Stefan

[sbrunthaler]

When I disassembled it, I found that the small sieve inside is clogged.
I will try to clean it, but I have no idea where the contamination came from.

Regards,
Stefan B.

[sbrunthaler]

Cleaned it, put everything together, and now the flow is fine.
But the pump head has a small crack, so I need a spare part.
Always empty the system for cold periods if you park the car over winter...

Regards,
Stefan B.