Orlando123, this is likely being caused by an air leak in the seam of the icemaker section. If the full model number of your appliance could be provided, this will allow the most accurate information to be presented.

Unfortunately, forced defrost is not going to affect the ice bin section. If you have a clothes steamer, it can be held about 6" from the bin to warm up the ice and get it to melt. Otherwise, the refrigerator would need to be unplugged with the doors open for about 24 hours. Once the ice bin is clear, the fill tube can be inspected for indications of an ice block and cleared as necessary. The ice dispenser chute would also need to be inspected for any air gaps that may be causing an air leak.