GE Profile Dishwasher Dry Boost Fan Screeching:... | appliancefaults.com

Technical Background:

The dishwasher's Main Control Unit (MCU) activates the Dry Boost fan motor via a relay circuit. The MCU sends a 120V AC signal to the fan motor based on temperature and drying cycle settings. The fan motor should operate smoothly and quietly. Issues in the voltage path or the motor itself can lead to unusual noises.

Symptoms:

The GE Profile dishwasher emits a loud screeching noise specifically during the Dry Boost cycle. The noise appears to be emanating from the fan assembly inside the dishwasher.

Possible Causes:

Fan motor bearings worn or failing.
Debris obstructing the fan blades.
Fan blade damage or imbalance.
Loose fan motor mounting screws.
Faulty fan motor control circuit.

Solution:

1

Disconnect power to the dishwasher at the breaker panel (LOTO).
2

Open the dishwasher and locate the Dry Boost fan assembly (typically near the top).
3

Inspect the fan blades for any visible debris or damage. Remove any obstructions.
4

Check the fan motor mounting screws for tightness. Tighten with a 1/4-inch nut driver if loose.
5

Disconnect the fan motor wiring connector. Use a multimeter to check for 120V AC when the Dry Boost cycle is active.
6

If voltage is present, replace the fan motor assembly. Ensure correct part number for your GE Profile model.
7

If no voltage, troubleshoot the control board or wiring harness.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs (Lock Out/Tag Out). High voltage is present when the dishwasher is powered on.

Prevention:

Periodically inspect the dishwasher interior for debris. Run a dishwasher cleaner cycle monthly. Avoid overloading the dishwasher to prevent items from obstructing the fan.

Expert Tip:

Many GE dishwashers have a service mode. Press and hold the 'Start' and 'Select Cycle' buttons simultaneously for 5 seconds. This may allow you to manually activate the Dry Boost fan for testing, but use caution.

Frequently Asked Questions

•How do I access the Dry Boost fan assembly?

Typically, you'll need to remove the upper rack and potentially some plastic trim pieces at the top of the dishwasher interior. The fan assembly is often located behind a panel secured with screws.

•Where can I find the correct replacement fan motor part number?

The part number is often printed on the fan motor housing itself. You can also find it in the dishwasher's parts diagram available on the GE Appliances website, using your specific model number.

•If there's no voltage to the fan, how do I troubleshoot the control board?

Troubleshooting the control board requires advanced electrical knowledge. Check for loose connections and visually inspect the board for burnt components. If you're not comfortable with electronics repair, it's best to consult a qualified appliance technician.

GE Profile Dishwasher Dry Boost Fan Screeching: Troubleshooting & Repair

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the Dry Boost fan assembly?

•Where can I find the correct replacement fan motor part number?

•If there's no voltage to the fan, how do I troubleshoot the control board?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: