The handle on the PVC door was sticking when I pushed it up to engage the multi lock, I used a little extra force but the handle just finished in a vertical position with no action on the multi lock. Brand name is lockmaster. I can close and open the door now but can not lock it.

Joe, December 2012

you can buy a replacement centre case
fitting is a little awkward but can be done
it needs full lmpl removed then replace gearbox job done

john cavill, February 2013

By forcing it you have striped the gearing, should have adjusted door, cheaper, sorry new lock needed.

Len, December 2012