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Hello my name is***** will be helping you today. Does the dispenser PCB light up and are all options responsive when depressed?
Okay, if you can stay in this chat with me we can get this done as quick as possible
I am going to link you a page, I want you to locate 402c, that is a small switch. That switch will work the water and ice dispenser. http://c.searspartsdirect.com/lis_png/PLDM/K0810256-00005.pngGrab a meter and check for continuity of that switch, make sure to unplug the power before testing. You may have to remove one wire from the switch so you dont get a false reading. If that is fine then check 278C is making contact with that switch when you press the lever down.
You have checked the switch for continuity and also made sure part 278c is making proper contact when you press the lever? Also, are you getting 120 volts to that switch? As far as the cube size on the ice maker, if youre getting power into the ice maker then the issue would be with the ice maker and you would have 2 different problems. If you have alraedy replaced the main pcb and dispenser pcb that rules out those (unless the wires arent on properly or the boards were lemons) both are highly unusual but it happens. If everything I ahve mentioned is fine you will have to find the wiring diagram for this unit and trace all wires.
That may work with that swich, if that switch has no continuity with pressed that switch is bad. You can also jump out the two wires connected but be warned you cannot turn off the dispsener or water valve if you jump it out. You can test if that switch is causing it becasue unplug the unit then connect the two wires on that switch then plug it in and it works, the switch is bad or isnt being contacted.
THe ice maker making ice is completely independent from the dispenser. Either way I am out of ideas and will opt out for another expert. Good luck.