Whirlpool Washer Drain Pump Repair - Voltage Dropping?

[wingdom]

Model Number

wtw5105hw1

Brand

Whirlpool

Age

1-5 years

Hello, my Whirlpool wtw5105hw1 washer drain pump is driving me up a wall. The old drain pump went bad, so I purchased a new one today, but it is still not running when installed.

I have a test cable that provides 120v, and when I hook the new pump up to that, it runs.

When I test the wires in the washer that go to the drain pump with my multimeter, the resistance is correct, and when I use the debug menu to activate the pump, the multimeter reads 80-90v, which is low. Is this because the shift actuator shares wires with the drain pump? The shift actuator is good, I can activate it with the debug menu on the washer.

The part I think is crazy is when I hook up the drain pump, the voltage supplied by the washer drops to 0. If I plug the drain pump in properly and touch a bit of exposed plug with the multimeter, 0v. The same bit of exposed plug reads 80-90v when there is no pump connected. Why would the voltage supplied by the washer drop to 0 when the pump is attached, and stay high when only connected to the multimeter?

Control boards for this washer seem to be $300, if they are even in stock, so if that is the problem, it is new washer time for sure.

 

[MStrommer]

Hello, my Whirlpool wtw5105hw1 washer drain pump is driving me up a wall. The old drain pump went bad, so I purchased a new one today, but it is still not running when installed.

I have a test cable that provides 120v, and when I hook the new pump up to that, it runs.

When I test the wires in the washer that go to the drain pump with my multimeter, the resistance is correct, and when I use the debug menu to activate the pump, the multimeter reads 80-90v, which is low. Is this because the shift actuator shares wires with the drain pump? The shift actuator is good, I can activate it with the debug menu on the washer.

The part I think is crazy is when I hook up the drain pump, the voltage supplied by the washer drops to 0. If I plug the drain pump in properly and touch a bit of exposed plug with the multimeter, 0v. The same bit of exposed plug reads 80-90v when there is no pump connected. Why would the voltage supplied by the washer drop to 0 when the pump is attached, and stay high when only connected to the multimeter?

Control boards for this washer seem to be $300, if they are even in stock, so if that is the problem, it is new washer time for sure.

I have the same problem with a 2007 Kenmore Model He2 Plus. I test the supply voltage by attaching my VOM to the plug of the supply line. Then I press the washer's power button, set the dial to the Rinse/Drain and Spin cycle and press start. As soon as hear click my VOM shows 119V. I detach the meter, repeat the above procedure and plug the connector into the motor and nothing happens. However the motor ohms out ok at 12 Ohms and when connected to my workbench 120 V receptacle , the motor runs fine. Makes absolutely no sense.