The diverter motor in a Whirlpool dishwasher controls water flow to the spray arms during wash cycles. Over time, this motor can wear out, causing poor cleaning performance, unusual noises, or even preventing the dishwasher from operating.
Replacing the diverter motor is a manageable repair that typically takes under an hour. By following this step-by-step guide and using the right tools, you can handle this repair yourself and avoid hiring a professional.
What Does the Diverter Motor Do?
The diverter motor regulates water flow to the spray arms, which distribute water and detergent throughout the dishwasher. Alternating the water between the upper and lower spray arms allows for the thorough cleaning of all dishes. It also enables features like Normal, Sanitize, or Auto wash cycles by adjusting water pressure and direction.
Signs of a Faulty Diverter Motor
If you notice any of these issues, the diverter motor may need replacement:
- Dishes are not cleaning well.
- Low or no water spraying from the spray arms.
- Grinding, buzzing, or other unusual noises during the cycle.
- Error codes related to water flow or the diverter motor on the control panel.
- Visible motor damage, overheating, or electrical malfunctions.
Tools and Materials Needed
- 5/8-inch open-ended wrench
- 5/16-inch nut driver
- Phillips screwdriver
- Torx T15 screwdriver
- Small flathead screwdriver
- Wire strippers
- Zip tie
- Towels or a small container
- New diverter motor (Make sure it is compatible with your specific dishwasher model).
Confirm Part Compatibility
Before replacing the diverter motor, verify you have the correct OEM part for your dishwasher model:
- Find the model number on your dishwasher. Look for a sticker or metal plate in these locations:
- Inside the dishwasher on the side wall or door frame.
- On the back or bottom of the unit.
- Near the control panel or console.
- Record or photograph the model number for reference when purchasing the replacement part.
Safety Precautions
Prioritize safety while working on your appliance:
- Disconnect the dishwasher by unplugging it or switching off the circuit breaker.
- Turn off the water supply to avoid leaks. Keep towels nearby to catch any residual water.
- If the dishwasher was recently used, allow it to cool down.
- Work in a well-lit, clutter-free area and keep pets and children away from the workspace.
- Refer to the user manual for any specific safety instructions.
- Handle parts carefully to avoid damage or injury.
- Wear insulated gloves to protect your hands, especially when dealing with sharp edges.
- Take photos or make notes of wiring connections before disconnecting them for easier reassembly.
How to Replace the Diverter Motor in a Whirlpool Dishwasher
Preparation
- Disconnect the dishwasher from the power outlet.
- Turn off the water supply to the dishwasher.
- Open the dishwasher door and take out the lower dish rack.
- Open the stoppers on each side of the upper dish rack rails.
- Slide the upper dish rack out and push the rails back in.
- Turn the base of the spray arm clockwise to release it, then lift it off.
- Turn the filter basket counterclockwise to unlock it, then lift it out.
- Use a Torx 15 screwdriver to remove the three screws securing the filter basket.
- Use a flat-blade screwdriver to release the clips on the sides and top of the manifold.
- Lift off the manifold cover and remove the diffuser plate.
Detach the Dishwasher
- Remove the two Phillips screws holding the dishwasher mounting brackets to the countertop.
- Place a towel or plastic container under the shut-off valve to catch water.
- Use a 5/8 open-ended wrench to disconnect the fill water line.
- Use a 5/16-inch nut driver to loosen the hose clamp and remove the drain hose. Be ready to catch any remaining water.
- Slowly pull the dishwasher out, supporting it by the frame or cabinet.
- Close the door and lay the dishwasher on its side.
Remove the Old Diverter Motor
- Use a Torx 15 screwdriver to remove the two screws holding the diverter motor.
- Use a flat-blade screwdriver to open the clips and remove the motor.
- Press the tabs on the plugs with a flat-blade screwdriver and disconnect them.
Install the New Diverter Motor
- Align the new diverter motor with the sump housing holes and push it in until the tabs lock.
- Secure the motor with the two Torx 15 screws.
- Reconnect the plugs to the motor sockets.
- If needed, cut and strip a pair of wires to the correct length using a wire stripper.
- Insert the wires into the fuse openings and tighten the screws with a small flat-blade screwdriver.
- Use a zip tie to secure the wires to the harness and trim off any excess wire.
- Push the yellow turbidity sensor plug back into place if it is loose.
Reattach the Dishwasher
- Return the dishwasher to an upright position.
- Slide it back under the counter.
- Reattach the mounting brackets to the countertop with screws.
- Thread the water line back onto the shut-off valve and tighten it with a 5/8 open-ended wrench.
- Connect the drain hose and secure it with the clamp using a 5/16-inch nut driver.
Reassemble the Internal Components
- Align the diffuser with the shaft, matching the cutout to the shaft shape.
- Secure the diffuser cover with a Torx 15 screw.
- Align the manifold and lock the clips on the sides and top.
- Secure the manifold with three Torx 15 screws.
- Insert the filter basket and turn it clockwise to lock it in place.
- Attach the spray arm by aligning the base and turning it clockwise to secure it.
- Slide the upper and lower dish racks back into place.
- Lock the rollers on the rails and secure the end caps.
Finalize and Test
- Plug the dishwasher back into the power outlet.
- Turn on the water supply.
- Run a test cycle to check for proper operation.
- Look for any leaks during the test cycle.
Don’t let a malfunctioning diverter motor keep your dishes less than spotless. As you’ve seen, replacing it is simpler than it appears and can dramatically boost your dishwasher’s performance.
Say goodbye to unusual noises and uneven cleaning, and hello to a smoothly running appliance that does its job just right. Take action today and enjoy the satisfaction of a perfectly clean kitchen every time you run a cycle!