Seat right side (LHD) doesn’t go up and down

If you use the button, you feel a click but nothing is happens. Forward and backword is functioning well.
What could be the trouble?
Is it easy to dismount the seat?

Hello Don. Looks like you’re new. Welcome!
Sorry I can’t help with your issue but I’m sure someone can.
Have a look at the PDF Manual on a recent post of mine. Search Seats for some information.
Good luck.