Wjsx for Model Number Electrolux EI23BC36 Hi. After reading the other questions concerning checking voltages to the evaporator fan motor, can you tell me specifically what the variable voltages should be on the yellow lead to the fan motor? I get a reading of 12 volts between the red and brown leads, and 12-ish volts between the yellow and brown leads for both the hi and low settings. Does this mean I have an problem with the main controller board? Also, when I use a battery to apply 12 volts simultaneously to the red and yellow leads, the fan works, but doesn't work when plugged into the refrigerator! Very confusing. Any help welcome. Thanks.
Answer WJSX, Here's a break down of the wiring to the variable speed evaporator fan motor : Brown wire is the common/ground lead. Blue wire is the Tachometer feedback circuit from the fan motor to the main control board. This is the only way the Main Control Board can know if the fan is actually moving or not as it is a varied voltage. Yellow wire is voltage that is varied by the Main Control Board in order to change the fan speed. Red wire is constant 12VDC from Main Control Board. So brown to red should have a constant 12 to 14 VDC. Brown to yellow will have 8 to 14 VDC from the board to the fan motor depending on the speed selected by the sensors and control board. Brown to blue will have 8 to 14 VDC depending on what speed to fan motor is running. You may want to check the voltages at both the control board and the evaporator fan, if you find a discrepancy. Read More... Answered by AppliancePartsPros.com | Tuesday, January 31, 2017