Diagnosing a Bad GE Board - Part 1: Fan Motors

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This video will be part 1 of a multi-part video series focusing in on how to diagnosing a failed GE control board when you have problems with either of your fan motors not running.

Most of the GE side by side refrigerators are going to use either a WR55X10942, WR55X10942P, or some very close variant of this board.
GE Control Board WR55x10942
https://amzn.to/3JpQyQe

WR60X10185: (4 wire with no sensor attached)
OEM GE Part: https://amzn.to/3KwDFVR
Cheaper Aftermarket Replacement: https://amzn.to/3uoc3MW

WR60x10074 (4 wire with thermostat attached)
OEM GE Part: https://amzn.to/3H6LcbM
Cheaper Aftermarket Replacement: https://amzn.to/377ePxp

If you have not found it already, you should have a wiring diagram tucked in to the temperature control box in the upper refrigerator section. This can be accessed by removing the two screws with a 1/4in nut driver.

As it relates to the fans, common symptoms of a failed control board include:
Fans that will not run
Fans that pulse and will not maintain consistent speeds
Burned resistors on the main control board
No response from any of the components other than the lights inside the refrigerator

Time Marks:
0:26sec - Location of control board
0:54sec - Unplug from power warning
1:10sec - Testing supply voltage to control board
2:00sec - How to turn on fan motors for testing - Entering Linear Protection Mode
2:22sec - J2 Plug identification and pin out order
3:03sec - Testing supply voltage of 12-14vdc to fan motors
4:48sec - Testing supply voltage to the fan motors
5:25sec - Testing supply voltage to the condenser motor
5:11sec - Unplug refrigerator from power and J2 plug removal
6:30sec - Testing fan motor circuits
7:28sec - J2 wire identification
7:44sec - Visual inspection of burned resistors
8:15sec - Wiring diagram and wire function for a 4-wire WR60x10185 evaporator fan motor
9:47sec - PWM Fan motor tachometer test (Blue Wire) Hz/Frequencty Test *Pulse WIDTH Modulation* Whoops.
11:10sec - Close Up of J2 connector and Recap
12:36sec - Please subscribe! :)