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Customer Questions and Answers for Impeller by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM20992845
Manufacturer Part Number: 4386996A

The Impeller is an OEM part for Whirlpool brand dishwashers. Located within the dishwasher sump assembly, this plastic component utilizes rotating blades to circulate wash water throughout cycles.

Causes of a bad impeller can include cracking or damage from minerals over time, chunks of food debris jamming the blades, or normal wear on plastic.

Symptoms of a faulty impeller include: 

  • Inadequate water circulation yielding poor cleaning 
  • Food particles or utensils not fully rinsed
  • Loud clicking or grinding noises mid-cycle
  • Error codes relating to low water pressure

Replacing the impeller restores optimum water flow for Whirlpool dishwashers. Proper circulation using the OEM replacement ensures all portions of dishes and cycles receive sufficient water volume. Compatibility also includes Maytag, Jenn-Air, Amana, Magic Chef, and other brands.

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Questions & Answers

For Whirlpool Impeller (Part Number: OEM20992845)

1 Answer

Bill, The drain screen cover will just be held in by clips and you would have to release the clips to pop it up.

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1 Answer

Mike, You would want to try to tap the impeller off with a rubber mallet so that you do not damage the shaft of the pump.

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1 Answer

Jerry, To get the impeller off you would need to use a pair of needle nose pliers and get behind the impeller and pry up on it to remove.

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1 Answer

Hello Glenn, This is most commonly caused by a clog in the drain system of the unit. If all screens are clear the issue is most likely the pump and motor assembly WPW10247394.

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1 Answer

Don, You will need to get into the collector and make sure that it is clear and that there is nothing that is clogging the pump assembly and make sure that the check ball is moving freely. If these check ok then also check drain line to make sure that it is not plugged up. If all this checks ok then the pump impeller would be the most likely issue. Part number 4386996A.

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1 Answer

Jack, You will need to pull the pump apart and check down inside for the spoon causing the unit to stall.

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1 Answer

Hello Jesus. Check and make sure the water level inside the unit is good and filling to the proper level and the spray arms are clean and not cracked. If so, then you will check the impeller and make sure it is good on the unit. If it is good, then the last restor is to replace the motor on the unit.

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1 Answer

Hi Fred. If the seal has been taken off then your best bet to replace it because of the age and it has most likely dry and cracked. The seal part # WP3369031 and the grommet part # WP3369037 can be installed with the liquid dishwasher soap or a light coating of syl - glide lubricant part # TJ17-132. Thank You.

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1 Answer

Hello Ted. Check and see if there is any debris in the pump and clogging it. If not, you will need to replace the pump assembly WPW10247394. Hope this helps.

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