How to Replace a Dishwasher Pump and Motor Assembly

 

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This dishwasher DIY repair guide gives step-by-step instructions for replacing the pump and motor assembly. The dishwasher pump and pump motor circulate water through the spray arms; when the spray arms aren’t spraying, the dishwasher pump or pump motor could be at fault. It's easier and cost effective to replace both parts at the same time, by installing a pump and motor assembly. And because you don’t have to fit the two components together, you avoid the risk of a leak at the joint if you don’t seat the seal correctly. For more dishwasher troubleshooting help, see our dishwasher DIY repair page.

Repair difficulty:
     
Time required:

Less than 45 min.

Parts Required

  • Pump and motor assembly

For manuals, repair guides, and specific part recommendations, enter your model number.

Tools Required

  • Nut driver set
  • Torx screwdriver
  • Channel-lock pliers
  • Rinse aid (to lubricate the pump seal)
  • Towel
  • Work gloves

Before you begin

Wear work gloves to protect your hands.

Instructions

 Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.

How to Replace a Dishwasher Pump and Motor Assembly

Step 1: Shut off electrical power and water supply to the dishwasher

Unplug the dishwasher or shut off the house circuit breaker for the dishwasher.

To verify that power is disconnected, make sure the control panel doesn’t light up when you press a control button or the power button.

Find the water supply valve for the dishwasher under the sink (or in the basement). Close the valve to shut off the water supply going to the dishwasher.

Step 2: Remove the spray arms

Open the dishwasher door and pull out the bottom dishrack.

Release the upper dishrack track stops and pull out the upper dishrack.

Release the bottom spray arm and remove it.

If you have a Kenmore dishwasher with a TurboZone spray arm, release and remove the TurboZone manifold.

Release the feed tube clips. Release the feed tube from the pump outlet and pull out the feed tube.

Step 3: Remove the bottom front access panel and toe panel

Using a nut driver, remove the screws that hold the bottom front access panel and toe panel in place.

Pull the access panel and the toe panel forward and remove them.

Step 4: Pull out the dishwasher

Position the dishwasher’s power cord so it moves freely as you pull the dishwasher out from under the counter.  (See Tip if your dishwasher doesn’t have a power cord.)

Place a towel under the water supply line connection. Disconnect the water supply line from the water inlet valve and wipe up spills.

Disconnect the drain line from the garbage disposal or sink drain.

Remove the 2 mounting screws from the brackets that secure the dishwasher in the cabinet opening.

 Tip: If your dishwasher power supply is hard-wired directly into the junction box, remove junction box cover and disconnect the wires. Remove the strain relief nut to release the power cable from the junction box. (The junction box is at the front of the dishwasher, just behind the bottom access panel.)

Step 5: Remove the drain pump

Carefully lay the dishwasher on its back to access the drain pump.

Lay a towel under the drain pump to catch water.

Squeeze the wire hose clamp that holds the drain hose on the drain pump—use channel-lock pliers if necessary.

Pull the drain hose off the drain pump.

Remove the wire harness from the drain pump.

Press down on the locking tab and then rotate the pump 1/4 turn counterclockwise and pull it out of the sump.

Wipe up any spilled water and remove the towel.

Step 6: Remove the pump and motor assembly

Disconnect the wires from the diverter motor and circulation pump motor.

Remove the optical water indicator from the sump and let it hang by the wire harness.

Tilt the dishwasher upright.

Release the sump mounting tabs.

Carefully open the dishwasher door while supporting the base to prevent the dishwasher from tilting forward.

Pull the pump and motor assembly up and out of the dishwasher tub and close the dishwasher door.

Step 7: Install the new pump and motor assembly

Transfer the filter cup and screen from the old pump and motor assembly to the new one.

Transfer the sump damper from the old pump and motor assembly to the new one.

Lubricate the sump seal with rinse aid.

Carefully open the dishwasher door while supporting the base to prevent the dishwasher from tilting forward.

Line up the mounting tab and insert the new pump and motor assembly into the tub.

Close the dishwasher door.

Engage the sump locking tabs.

Carefully lay the dishwasher on its back.

Lubricate the O-ring on the optical water indicator with rinse aid reinstall the water indicator.

Plug in the diverter motor and circulation pump wire harnesses.

Step 8: Reinstall the drain pump

Lubricate the O-ring water seal on the drain pump with rinse aid.

Insert the drain pump in the sump opening and then rotate it 1/4 turn clockwise so the locking tab snaps into place.

Reconnect the wire harness on the drain pump.

Reinstall the drain hose on the outlet of the drain pump. Use the wire clamp to secure the drain hose on the drain pump outlet.

Step 9: Reinstall the dishwasher

Tilt the dishwasher upright and carefully push the dishwasher under the counter.

Reconnect the drain hose to the garbage disposal or sink drain.

Reconnect the water fill line to the inlet water valve.

Insert the screws into the mounting brackets that secure the dishwasher under the counter and tighten the screws.

Position the toe panel on the dishwasher and then position the access panel in front of the toe panel. Insert and firmly tighten the mounting screws.

 Tip: If the dishwasher hardwires into a junction box, push the power cable into the junction box and reinstall the strain relief nut. Reconnect the wires in the junction box and reinstall the junction box cover.

Step 10: Reinstall the spray arms

Open the dishwasher door.

Reinstall the feed tube and snap it into the mounting clips.

If you have a Kenmore dishwasher with a TurboZone spray arm, reinstall the TurboZone manifold.

Reinstall the bottom spray arm.

Push the upper dishrack into the tracks and reinstall the track stops.

Put the lower dishrack back into the tub.

Step 11: Restore electrical power and the water supply

Reset the house circuit breaker or plug in the dishwasher to restore electrical power.

Open the water supply valve.