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Hi DMRR,
I am currently working my way through a similar problem with my 2006 FFRR.
Was getting the same error, pressure not decreasing when venting gallery which would reset itself with stopping the car, key out and then turning back on but would keep returning at differing intervals, sometime 5 mins, or 5 days, there was no logic to it at all.
If I used the height control knob on the dash, raising was no issue, it was lowering that was giving problems... kept thinking it was stuck and going into extended mode...
Anyhow, I started with the easy stuff and so far (2 days of testing) I have not had any recurrence so if this works, I need a couple of new parts.
I took a look at the drier on the compressor and the exhaust muffler. The muffler looked new (brass type) and I could blow through it without too much force so discounted that initially. The drier media (silica gel beads) were a mix of dark brown, light brown, opaque white and a shed load of white powder. I'm pretty sure the beads are supposed to be an almost clear white colour when new and no powder.
I emptied out the container and cleaned it up and put it back together with no media inside it (left the filters out also) and tried the car, it went up and down like a fiddlers elbow no problems at all, screwed back in the brass muffler, fault came back straight away when lowering.
I am trying to source some new beads to refill the drier but getting them out here in the middle east is proving a challenge, and in the mean time I have been soaking the muffler in some solvent (thinners) to try and break down whatever is clogging it up on the inside, then I will blow it through backwards with some high pressure air from the local garage and try it again.
Hopefully that will sort it out and maybe what I have described might be of some use to you in your quest.
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7th Apr 2017 10:47am
