Needed to carry out this procedure today and found it and some of the previous comments made by others a bit confusing so thought I'd try to clarify it for those as challenged as me. I've edited out the unnecessary bits of the Workshop manual procedure and copied it below for reference.   In order to carry out step 3) of the procedure you have to operate the "reset switch" located behind the door card, but if you take door card off to gain access you cant shut the door to operate the door swi