Hi, you can use the k50 p1125, or the k50 p1126, the higher the number the lower the cutting temp. or similar, also asks for the generics for a door, they work well, the problem that it freezes only part of the evaporator, asks to be refrigerant leakage, decompressed motor or partial plugging., is to verify the gas charge, if it does not have a service valve puts a pinchasr and check the current load of refrigerant, if you have little, look for leaks, you could cut the system to make it faster if they are not visible, if the load is complete check compressor, lavas system, etc. , regards.