Did enough google research to be comfortable in tackling this.
Removed water filter to stop water flow in case i hit the lever while uninstalling.
Removed one screw directly in front of dispenser
Pryed where screwdriver slot next to screw (removed) was located, pulling horizontally towards me until the LCD display came out. It is held in by plastic clips - the LCD display and the plastic piece (where the screw was) remain in one piece - avoid the temptation to separate them
Remove two screws holding the dispenser unit onto the door.
Pull dispenser unit out towards you
Remove wire connections & slide water-tube out the top of the old mechanism.
Replace with the new mechanism
Route wires/tube back as they were
Fasten mechanism back into place using the two screws
Replace Display & plastic piece by snapping back into place
Replace the single screw into the plastic piece.
Was done in 15 minutes or less.
Worst part was fear of damaging the plastic piece and the LCD display - fairly strong force needed to unsnap it but no damage so I was relieved when it came out damage free.