hi you could leave door open but you would need to take light bulbs out as they would overheat and possibliy burn light casing ...
you will need this samsung fridge freezer repair kit to solve your prob ...
here a clip from a samsung agents ebay listing re this fault ..
symptoms include
high temp in fridge
fridge display will read normal
noise in fridge - (stops when fridge door opened)
ice build up around water tank - may stop water dispensor
temp in freezer will not be effected at all
correct high temp display will be shown if you switch appliance off & on
please call our samsung helpline for free advice 07407 734 204
ebay item number: 280596204942 £80.00
direct from a samsung main agent , they also offer loads of advice free of charge ..
youtube channel also
http://www.youtube.com/user/samsungfridgefreezer?feature=mhum
hope this info will be of use to you
calum, February 2011