Icemaker Stopped Working In Whirlpool American Style Fridge/Freezer?

Can anybody out there help please?
We have a Whirlpool American Style Fridge Freezer which has an Icemaking machine in the freezer section. Recently this stopped making the ice but the water supply is running fine. It happened overnight so appears it could well be a switch or lever maybe that has broken or jammed possibly? It was also suggested that it may be the red light on one of the side panels which may have broken down?? I spoke to Whirpool who said it could cost £200 for parts and labour costs so I wondered if anybody would be kind enough to assist me - just in case its just something simple that can be adjusted/mended by me? Any assistance would be much appreciated.
Thanks.