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Maytag Model MFI2568AEW freezer works but the refrigerated doesnt

My Maytag model MFI2568AEW refrigerator section doesnt work. Freezer works fine. Condenser fan and compressor work. Evap fan fails to turn on. Ice/water dispenser do not work. I have replaced: temperature control board, evap fan, and verified thermistors are working. Put refrigerator in diagnostic mode and both the evap and ice machine fans work. Any suggestions as everything points to the main control board as being faulty.

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@John Wiltfong

Does the freezer light go out when the freezer door switch is manually operated, you didn’t say.

If so then the freezer door switch is OK.

Check that it is the same for the refrigerator compartment. Looking at the wiring diagram the refrigerator compartment has two door switches, left and right. However when searching for the location of the refrigerator door switch locations using the parts diagrams there are only 2 door switches shown, one for the freezer and only one for the refrigerator.(Scroll right to find the Wiring Information diagram along with the other parts diagrams).

The door switch has basically two functions. Signal the control board to turn on/off the light and to turn off/on the evap fan when a door has been opened and closed. (as long as the compressor is running)

If all the switches work OK when manually operated i.e. appropriate light turns off then it is looking like a control board problem.

If operating/releasing one of the door switches doesn’t affect the operation of its light then maybe check that the door switch is working OK electrically when operated and released by testing it with an Ohmmeter. Do this with the power disconnected from the refrigerator as AC line voltage goes through the switches.

The circuit shows that the refrigerator door switch is a changeover switch (part #19 - ref light/water tank/filter valve parts diagram) so there should be continuity through one set of its contacts when operated and through the other set when it is released and that the freezer door switch is just a break switch i.e. has continuity when released (part #4 - frz light/evaporator/evap fan assembly parts diagram). Apologies if you know how to test switches etc

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Thanks for the tips. The lights all work with the switches depressed/released. I even taped the freezer switch to simuate the door being closed and the evap fan never came on. The strange thing that i have found is that in the diagonstic mode, all fans (Evap, condenser, and ice machine) work, the ice maker functions with the switch, the water dispenser works when tested, etc. Even the thermistors are registering temperature and temp changes. Everything points to the main PCB as being faulty, which is the last thing to replace. The compressor kicks on as normal.

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@John Wiltfong

You can verify that it is the control board by checking for voltage to the evap fan at the board. The wiring diagram has the details.

I was wondering if when in diagnostic mode the components are just simply tested to make sure that they work whereas in "normal" mode other factors are taken into consideration e.g. with the evap fan it is necessary for the doors to be shut and that the temperature to be above the threshold for the fan to be stopped etc.

Maybe not though, if the diagnostics don't work with a door open for example. Just a thought.

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@jayeff

I ended up replacing the mainboard and that fixed the problem. Was very frustrating as the mainboard was the LAST thing that was listed as a fault. Once I put it in, connected it up, and plugged in the unit, everything worked. Needless to say, I have a spare evap fan motor and control board. Thanks for the help.

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@John Wiltfong

Thanks for the feedback.

Cheers

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John Wiltfong さん、ありがとうございました!
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