The mirrors refused to fold one day. Investigating I have found that if you manually fold them (not recommended but i was getting desperate) they would unfold.
The mirror adjuster (the square 4-way) is lit orange as it should do and when the mirror adjustment is selected (i.e. mirror rocker switch selected passenger or drivers side and not in the middle as need for folding action) the mirrors respond and adjust normally.
Any idea what else i can do to debug them - it is both sides that fail to fold...