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

Technical Background:

The Leak Protect sensor is a safety device designed to detect water accumulation in the base of the dishwasher. When water is detected, the sensor signals the MCU to shut down the dishwasher to prevent further water damage. The MCU uses low voltage (typically 5V DC) to monitor the sensor's state.

Symptoms:

US homeowner reports dishwasher displaying a Leak Protect error code. The dishwasher may be stopping mid-cycle or refusing to start.

Possible Causes:

Corroded wiring harness connections to the Leak Protect sensor.
Water accumulation under the dishwasher affecting the sensor's operation.
Faulty Leak Protect sensor itself.
Damage to the main control unit (MCU) preventing proper sensor readings.
Loose wiring connections at the MCU.

Solution:

1

Turn off the dishwasher and disconnect power at the breaker panel.
2

Locate the Leak Protect sensor at the base of the dishwasher. Usually near the front, inside the machine’s base.
3

Inspect the wiring harness and connector leading to the sensor for signs of corrosion. Use a multimeter to check for continuity along the wiring.
4

If corrosion is present, carefully disconnect the harness from the sensor and replace the corroded wiring or the entire harness using appropriate gauge wire and waterproof connectors.
5

Clean the sensor area to ensure no water is present. Check the float switch nearby, ensuring it moves freely.
6

Reconnect the wiring harness to the sensor, ensuring a secure connection. Restore power at the breaker panel.
7

Run a diagnostic cycle on the dishwasher to clear the Leak Protect sensor error. If the error persists, the sensor itself may be faulty and require replacement. Check for 120V AC at the sensor connector to confirm power supply.

Safety Warning:

Lock Out Tag Out (LOTO) the breaker before working on the dishwasher. Dishwashers operate on 120V AC. Contact with live voltage can cause serious injury or death.

Prevention:

Regularly inspect the dishwasher's water supply line and drain hose for leaks. Clean the interior of the dishwasher to prevent food buildup, which can contribute to leaks and corrosion. Ensure proper leveling of the dishwasher to prevent water from accumulating in the base.

Expert Tip:

After replacing the wiring or sensor, enter the dishwasher's service mode (refer to the service manual for your specific model) and run a calibration cycle for the Leak Protect sensor to ensure proper operation.

Frequently Asked Questions

•What is the resistance value I should expect from a working Leak Protect sensor?

Typically, a functioning Leak Protect sensor will have a very high resistance (near infinite) when dry and a low resistance (close to 0 ohms) when wet. Use a multimeter to measure the resistance in both states.

•How do I access the diagnostic mode on my GE dishwasher?

Diagnostic mode access varies by model. Refer to your dishwasher's service manual or search online using your model number and 'diagnostic mode'. Common methods involve pressing a specific sequence of buttons, like 'Start', 'Heated Dry', 'Start'.

•Where can I find the wiring diagram for my GE dishwasher model?

The wiring diagram is often located inside the dishwasher's control panel or on the back panel. You can also find it in the service manual for your specific model number, available from appliance parts retailers or the manufacturer's website.

GE Dishwasher Leak Protect Sensor: Wiring Replacement Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the resistance value I should expect from a working Leak Protect sensor?

•How do I access the diagnostic mode on my GE dishwasher?

•Where can I find the wiring diagram for my GE dishwasher model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: