I have a Whirlpool fridge model KSSC42QTS00. The compressor seems to be clicking in and out and making a small chirping noise. The interval varies from every 5-10 seconds to 2-3 minutes. The evaporator fan is working. I have also cleaned out the coils with no improvement. My web searched suggest it could be the overload protector, compressor relay or the defrost control board, but in the parts diagram for this model it is not clear where these parts are. I hope that you can offer me some help.