GE Dishwasher Leak Protect Sensor: Wiring Replacement... | appliancefaults.com

Technical Background:

The Leak Protect sensor monitors for moisture in the base of the dishwasher. When moisture is detected, the sensor sends a signal to the main control unit (MCU). The MCU then activates the drain pump and displays an error code. Corrosion on the wiring can disrupt the signal, causing false alarms or preventing the system from functioning correctly.

Symptoms:

The homeowner reports the dishwasher displaying error codes related to a leak, even though no visible leak is present. The dishwasher may also intermittently fail to start or complete cycles.

Possible Causes:

Corroded wiring harness due to water exposure.
Detergent residue buildup causing electrolysis.
Damaged wire insulation allowing moisture ingress.
Loose wiring connections leading to arcing and corrosion.
Failed Leak Protect sensor causing excessive current draw.

Solution:

1

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

Locate the Leak Protect sensor, typically in the base of the dishwasher tub.
3

Carefully inspect the wiring harness connected to the sensor for signs of corrosion, especially at the connector.
4

Disconnect the corroded wiring from the Leak Protect sensor and the main control board.
5

Using a wire stripper/crimper, prepare new wiring of the same gauge as the original. Crimp new connector terminals onto the new wires.
6

Connect the new wiring harness to the Leak Protect sensor and the main control board, ensuring a secure connection. Check for continuity with a multimeter.
7

Apply dielectric grease to the connections to prevent future corrosion.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Lockout/Tagout (LOTO) procedures should be followed to prevent accidental re-energizing of the circuit. The dishwasher operates on 120V AC, which can be lethal.

Prevention:

Periodically inspect the dishwasher's base for leaks and clean up any spills promptly. Use the recommended amount of detergent and avoid overfilling the dispenser. Ensure proper drainage to prevent water from pooling in the base.

Expert Tip:

After replacing the wiring, run the dishwasher through a short diagnostic cycle. On some GE models, holding the “Start/Reset” button for 5 seconds initiates a service mode that tests all components, including the Leak Protect sensor. You might need to consult the tech sheet to find the exact sequence for your specific model.

Frequently Asked Questions

•How do I locate the tech sheet for my GE dishwasher model?

The tech sheet is usually located behind the kick panel at the bottom front of the dishwasher, or sometimes taped to the inside of the control panel. You can also search online using your model number plus "tech sheet."

•What type of wire is recommended for replacing the corroded wiring?

Use stranded copper wire of the same gauge (typically 18 or 20 AWG) as the original wiring. It should be rated for at least 300 volts and 105 degrees Celsius to withstand the heat and moisture inside the dishwasher.

•What is the typical resistance reading I should expect from a functional Leak Protect sensor?

A functional Leak Protect sensor should typically read a high resistance (open circuit) when dry and a low resistance (close to zero ohms) when wet. Use a multimeter to check the resistance under both conditions to verify its functionality.

GE Dishwasher Leak Protect Sensor: Wiring Replacement Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I locate the tech sheet for my GE dishwasher model?

•What type of wire is recommended for replacing the corroded wiring?

•What is the typical resistance reading I should expect from a functional Leak Protect sensor?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: