GE Dishwasher Leak Protect Sensor: Cleaning Guide for... | appliancefaults.com

Technical Background:

The Leak Protect sensor is designed to detect water accumulation in the base pan of the dishwasher. When water is detected, the sensor sends a signal to the main control board (MCU). The MCU then activates the drain pump and disables further operation to prevent water damage. The sensor typically operates on a low voltage DC circuit (5V DC) provided by the MCU. Resistance changes based on water presence. A corroded or dirty sensor may send a false signal to the MCU.

Symptoms:

The GE dishwasher displays a 'Leak Protect' error, stops mid-cycle, or refuses to start. You may find water accumulated under the dishwasher or hear an alarm. The control panel may flash or display a specific error code related to the Leak Protect sensor.

Possible Causes:

Food debris accumulation on the sensor.
Corrosion of the sensor terminals due to water exposure.
Loose wiring connections to the sensor.
Faulty Leak Protect sensor.
Water pooling in the base pan of the dishwasher.
Defective main control board (MCU).

Solution:

1

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

Remove the lower access panel of the dishwasher using a 1/4-inch nut driver.
3

Locate the Leak Protect sensor, typically in the base pan.
4

Inspect the sensor and surrounding area for standing water. If present, identify and repair the leak source.
5

Disconnect the sensor wiring connector. Clean the sensor and connector terminals with a wire brush or electrical contact cleaner.
6

Using a multimeter, check the sensor's resistance. Refer to the service manual for the correct value. Replace if out of spec.
7

Reconnect the sensor wiring, restore power at the breaker panel, and test the dishwasher.

Safety Warning:

Disconnect power to the dishwasher before performing any repairs. Lock Out/Tag Out (LOTO) the breaker to prevent accidental power restoration. The dishwasher operates on 120V AC, which can cause electrocution.

Prevention:

Regularly inspect the dishwasher for leaks around the door, spray arms, and water inlet valve. Clean the dishwasher's interior and filter frequently to prevent food buildup. Periodically check the Leak Protect sensor for debris or corrosion.

Expert Tip:

Some GE dishwashers have a service mode that allows you to bypass the Leak Protect sensor for testing purposes. Consult the service manual for the specific sequence to enter service mode. Use this feature with caution and only for diagnostic purposes.

Frequently Asked Questions

•What is the correct resistance reading for a functional Leak Protect sensor?

The resistance reading varies depending on the specific GE dishwasher model. Refer to the service manual for the correct value. Typically, a dry sensor should have a very high resistance (open circuit), while a wet sensor should have a low resistance (near short circuit).

•How do I identify the source of a leak in the dishwasher base pan?

Check the door seal for damage or wear. Inspect the spray arms for cracks or clogs. Examine the water inlet valve and drain pump for leaks. Also check the hose connections for tightness and signs of leakage. Use a flashlight to trace the water back to its origin.

•If the Leak Protect sensor is clean and dry, but the error persists, what else could be the problem?

A faulty main control board (MCU) could be misinterpreting the sensor's signal. Check the wiring harness between the sensor and the MCU for damage or loose connections. You may need to consult a qualified technician to diagnose and repair the MCU.

GE Dishwasher Leak Protect Sensor: Cleaning Guide for Dirty or Corroded Sensors

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct resistance reading for a functional Leak Protect sensor?

•How do I identify the source of a leak in the dishwasher base pan?

•If the Leak Protect sensor is clean and dry, but the error persists, what else could be the problem?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: