KitchenAid ProDry Dishwasher: Loud Grinding/Rattling Fan... | appliancefaults.com

Technical Background:

The ProDry fan is controlled by the dishwasher's main control unit (MCU). The MCU sends a 120V AC signal to the fan motor based on the drying cycle's programmed logic and temperature sensor readings. The fan helps circulate air to enhance drying performance.

Symptoms:

The KitchenAid ProDry dishwasher makes a loud grinding, rattling, or buzzing noise during or after the wash cycle. The noise seems to be coming from the vent area, where the ProDry fan is located.

Possible Causes:

Debris obstruction (food particles, small objects).
Worn fan motor bearings.
Fan blade damage or imbalance.
Loose fan mounting screws.
Faulty fan motor winding.

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Verify 0V AC at the dishwasher's receptacle using a multimeter.
2

Locate the ProDry fan assembly. This is typically accessible from inside the dishwasher cavity, often near the vent.
3

Inspect the fan area for any visible obstructions like food particles or foreign objects. Remove any debris.
4

Check the fan blades for damage or imbalance. If damaged, the fan assembly needs replacement.
5

Check the fan motor mounting screws. Tighten any loose screws using a 1/4-inch nut driver.
6

If noise persists, test the fan motor. Unplug the fan motor connector. Check the motor winding resistance. An open or shorted winding indicates a faulty motor. Replace the fan motor if needed.
7

Reassemble the components and restore power to the dishwasher.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lockout/Tagout (LOTO) procedures should be followed. High voltage (120V AC) is present when the dishwasher is powered on.

Prevention:

Regularly clean the dishwasher's interior, including the vent area, to prevent food particles from accumulating near the ProDry fan. Avoid placing small objects in the dishwasher that could potentially obstruct the fan.

Expert Tip:

Some KitchenAid dishwashers have a service mode. To access the service mode, press and hold the 'High Temp Wash' and 'Heated Dry' buttons simultaneously for about 5 seconds. This might allow you to manually activate the fan for testing purposes.

Frequently Asked Questions

•How do I remove the interior panel to access the fan?

Usually, you'll need to remove screws along the door's inner edge. Typically a Torx T-20 or T-25. Once the screws are removed, the panel should lift or slide off, giving you access to the fan assembly. Be careful not to damage any wiring.

•What is the resistance range I should expect from the fan motor windings?

Typically, a good fan motor winding should measure between 50-150 ohms. An open circuit (infinite resistance) or a very low resistance (near zero) indicates a faulty motor.

•Where can I purchase a replacement ProDry fan assembly?

You can purchase a replacement fan assembly from appliance parts retailers, both online and in local stores. Make sure to have your dishwasher's model number handy to ensure you get the correct part. Sites like AppliancePartsPros.com, RepairClinic.com, or Sears PartsDirect are good starting points.

KitchenAid ProDry Dishwasher: Loud Grinding/Rattling Fan Noise - Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I remove the interior panel to access the fan?

•What is the resistance range I should expect from the fan motor windings?

•Where can I purchase a replacement ProDry fan assembly?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: