The last guest has some of the right idea but terminology is wrong. Refrigerant can carry oil into the capillary tube through the filter/dryer and block the capillary tube resrtricting the gas flow. The part that he heated with water at the back of the fidge is in fact the dryer. He was lucky to clear the system with this method, but normally requires a new filter/dryer and re gas. It is also quite common for this model to loose a bit of refrigerant over a period of time, and may need to be re gassed. The original fault that Noobi experienced sounds like this was his problem, not the commpressor.