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Customer Questions and Answers for Run Capacitor by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18071040
Manufacturer Part Number: WPW10662129

The Run Capacitor is an OEM part for Whirlpool appliances, designed to provide the necessary electrical charge to start and run the compressor motor. This part attaches to the compressor to aids in maintaining a consistent motor speed and ensuring smooth operation. The run capacitor plays a crucial role in the appliance's electrical system, storing and releasing energy as needed to power the motor.

Causes of a bad Run Capacitor include electrical surges, wear and tear over time, or overheating, which can lead to a failure in providing the necessary start-up energy or maintaining motor speed.

Symptoms of a bad Run Capacitor include:

  • The appliance does not start.
  • The motor shuts off shortly after starting.
  • The appliance is humming but not running.
  • Increased energy consumption.

This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.

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Questions & Answers

For Whirlpool Run Capacitor (Part Number: OEM18071040)

1 Answer

Shaw, The capacitor for this model will be part number WPW10662129 but in most cases, the capacitor does not fail and it is a faulty start device causing the compressor to not run. capacitor is a run capacitor not a start capacitor.

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1 Answer

Mike, The refrigerator receives its air from the freezer. So if the freezer has stopped cooling adequately then you will need to remove the rear panel and check the coils frost pattern looking for a total sheet of ice meaning a defrost issue or half frost pattern meaning a sealed system issue that would require a visit from a refrigeration tech.

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1 Answer

WW, You will want to check to see what is running and what is not. If the fans run but the compressor is not then test to see if there is 120 Vac to the compressor. If there is then the start device would be the most likely issue. If there is not power then this will be a control board that is faulty. If there are no fans or compressor running then the control board will be the likely issue.

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1 Answer

Barney, it would not be recommended that an alternative capacitor is used that does not have the same operating parameters as the manufacturer recommended capacitor WPW10662129. Doing so could potentially impact the operation.

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Len for Model Number WRT134TFDW00

Initially I had voltage to the compressor but it was not running. Replaced the start capacitor and start relay now the compressor is "running" but unit still not getting cold. Thermostat appears to be operational as the fans and compressor can be turned off with the thermostat. Per the wiring diagram there is a overload switch, where is that located, on the compressor? The wiring diagram shows the overload is located independently from the wiring to the evaporator and condenser fans. Power to the evaporator fan is piggybacked at the capacitor plug. The entire refrigerator cooling process will "turn off" after attempting to cool regardless of the thermostat setting. What am I missing here?

1 Answer

Hello Len, the overload is built into the PTC start device you replaced. If the compressor and fans are running and there is no cooling in the freezer then ref has a sealed system problem.

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1 Answer

Dee, the evaporator in the freezer would need to be inspected to identify if it is completely blocked up with ice or not. If it is, there is a defrost issue that would need to be addressed. If the evaporator does not have any frost on it and the compressor is running, there is a sealed system issue that would require an EPA certified tech to diagnose and repair the sealed system. Unfortunately, the model number provided is not registering as a valid model. If the model and serial numbers could be verified and provided on a new inquiry, this will allow for the most accurate information to be presented.

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1 Answer

Hello, Cindy. The capacitor for your refrigerator compressor is part number: AP6023677. You are correct. Thank you.

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Rudi for Model Number EV190NXWN00

Picked up this upright freezer from a friend which was manufactured in 1991 to replace my working but not self defrosting upright freezer which was manufacture at least 10 years earlier but is still working fine. I plugged the "new" freezer into a working power outlet and absolutely nothing happens. No noise from the compressor and no light from the interior not sparks from anywhere. I replaced the bulb with a know working bulb - nothing Fiddled with the on/off switch - Nothing Double checked the power from the outlet - good voltage detected Checked the cord up to the point where the wires go is several different directions. - good voltage detected Removed the covering for the temp control switch inside the freezer and checked for voltage going into that rotary temp control switch - good voltage detected. Then I thought should I really be spending so much of my time on an old machine? But if I could get it going with new parts under $100. It could be worth the trouble. Any ideas? Thank you.

1 Answer

Rudi, It is possible that you have voltage to the thermostat but not leaving and supplying voltage to the compressor and fans. Check the thermostat for continuity with the control turned to run and see if you have a closed circuit. No continuity or [open circuit] and you will need to replace the thermostat.

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1 Answer

Julie, With the unit not running at all, no fans or compressor running, try to unplug the unit for a minute and then plug back up and see if it does not come on. If it does not then this would most likely be an issue with the defrost control board WPW10352689.

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1 Answer

John, the compressor should be running any time the evaporator and condenser fans are running. If the compressor is running and it it not producing any cold air, you would have a sealed system issue. The compressor has either failed or the system is out of Freon.

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