My drivers seat height adjustment has stopped working.
It's as high as it will go, I can hear the motor click and try to move in both directions but its jammed.
I have the seat out but can't see how to try t solve this
Anybody have any experience with this problem?

 

So I found a few posts about this problem but no solutions
This morning I took the motor off, took the gearbox off the seat frame and found that the screw gear from the gearbox to the seat lever was jammed at its extreme position.
Grabbed the screw drive in a pair of pliers, using a couple of layers of cardboard to prevent damage to the gear and worked it back and forth and eventually it freed itself.
Worked it in and out a few times, lubricated with silicone grease and reassembled;

This shows the gearbox off the seat frame which allowed me to grip the shaft and work it loose again

So this shows it all back together again
Hopefully when the seat goes back I'll have height adjustment of the rear of the squab back again.

 

Just wanted to thank the original poster, just gave this a try on my wife's 04 VDP, she tends to put the seat all the way up where it seems to jam the worm gear and won't go back down. Applied grease to the worm gear and them rocked the dismounted motor back and forth by hand until it feed up, will report back on how it holds up (first thing is to reprogram the seat preset so its not all the way up).