I have an enduro bike with a Rockshox Yari fork (160 mm travel), and now it won't compress even 10% even with the air side fully open (so 0 PSI pressure there). It seems that something has gone very wrong on the rebound / oil side. It feels as if there was a remote lock on it, but it doesn't have such feature.
I had it serviced one year ago, and in recent months I have used it for commuting and had to store it in sub-zero temperatures at work. But it hasn't been overly wet, so I don't expect corrosion.
When I move it up and down, the oil-side is making sounds as if it is trying to suck air from random places. This happens wheter I am pushing it in or trying to extend it.
Is there any easy fix for this, or will it have to be serviced again?