GE Profile Dishwasher Dry Boost Whistling Noise:... | appliancefaults.com

Technical Background:

The Dry Boost feature uses a blower motor to circulate hot air and a heating element to dry dishes. The MCU (Main Control Unit) controls the blower motor and heating element through relays, based on temperature sensor data and programmed cycles. Voltage is supplied from the breaker panel, stepped down through the power supply on the main board, and then routed to the various components.

Symptoms:

The GE Profile dishwasher produces a high-pitched whistling noise during the Dry Boost cycle. The dishwasher may otherwise function normally.

Possible Causes:

Failing blower motor bearing or windings causing vibration and noise.
Obstruction in the vent path restricting airflow and creating a whistling sound.
Faulty heating element relay causing the heating element to cycle rapidly.
Loose blower motor mounting screws amplifying vibrations.
Damaged blower motor impeller rubbing against the housing.
Software Glitch in the Main Control Board.

Solution:

1

Turn off the breaker to the dishwasher. Verify zero voltage at the dishwasher junction box using a multimeter.
2

Remove the lower access panel and the toe kick. Use a 1/4-inch nut driver.
3

Locate the blower motor assembly. Disconnect the wiring harness to the motor.
4

Visually inspect the blower wheel for any obstructions or damage. Rotate the blower wheel by hand to check for smooth operation.
5

Using a multimeter, check the blower motor winding resistance. It should be approximately 5-15 ohms. An open circuit indicates a faulty motor.
6

If the blower motor checks out, inspect the vent ductwork for any obstructions. Remove the vent covers and check for blockages. Reassemble after inspection.
7

If no issues are found with the blower motor or vents, replace the blower motor.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before attempting any repairs. High voltage is present within the dishwasher. Follow Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energization of the circuit.

Prevention:

Regularly clean the dishwasher filter and inspect the spray arms for clogs. Avoid overloading the dishwasher to ensure proper airflow. Once a year, run a dishwasher cleaning cycle with a commercial dishwasher cleaner.

Expert Tip:

Enter the service mode by pressing and holding the 'Start' and 'Select Cycle' buttons simultaneously for 5 seconds. This will allow you to run individual component tests, including the blower motor, to isolate the source of the noise.

Frequently Asked Questions

•What is the typical lifespan of a GE Profile dishwasher blower motor?

The typical lifespan is 5-7 years, depending on usage and water quality. Hard water can shorten the lifespan.

•Can I use a generic blower motor instead of a GE branded replacement?

While it may be possible, it's generally recommended to use a GE branded replacement part to ensure proper fit, performance, and safety. Check that voltage and amperage are equivalent.

•How do I access the main control board to check the heating element relay?

The main control board is typically located behind the control panel. You'll need to remove the control panel screws and carefully disconnect the ribbon cables. Be sure to disconnect power before accessing the control board.

GE Profile Dishwasher Dry Boost Whistling Noise: Troubleshooting and Fix

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical lifespan of a GE Profile dishwasher blower motor?

•Can I use a generic blower motor instead of a GE branded replacement?

•How do I access the main control board to check the heating element relay?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: