hi copied and pastted from previos post - if out of warranty you can get diy kits ..
samsung fridge freezer problems ? 
RS21 NOT COOLING IN FRIDGE - NOISY 
RSH1 NOT COOLING IN FRIDGE - NOISY 
i hope this post helps you save a lot of time by not messing about trying all the weird and wonderfull help/tips that you can find on the internet 
we have tried every help/tip thats availabale on the internet reguarding this problem - but you cant solve this without replacing faulty parts ... yes you can keep appliance working for another month by defrosting it but this is only really delaying problem .. 
we came across this guy on you tube who is an expert on samsung fridge freezers he is authorized samsung repairer and has repaired over 3000 appliances..
http://www.youtube.com/user/SamsungFridgeFreezer
we explained what we have tried so far etc , and he said everyone says the same thing ..bottom line is there is no quick fix - the only way to totaly cure fault is to replace the faulty components .. he does a kit which is available on ebay ...
RS21 KIT Item number: 280596204942
RSH1 KIT Item number: 280583238579
these are the cheapest that i can find , when we bought kit it was a good £30 cheaper than anywhere else 
with this guy your not just buying spares they offer full back service via the samsung trained engineers all free of charge - 
video on how to fit part etc also with kit 
if you check this guy feed back you will see how may people he has helped ...
he tel no is below most of the youtube videos so i dont think he will mind me putting on here ..
samsung repairs - spares - advice 
tel 07407 734 204
                
 CALUM
                
 May 2011