GE Dishwasher Leak Protect Sensor Bypass: Troubleshooting... | appliancefaults.com

Technical Background:

The GE dishwasher's Main Control Unit (MCU) monitors the leak sensor. The sensor typically operates on a low-voltage DC circuit (5V DC). When water is detected, the sensor closes the circuit, signaling the MCU to activate the drain pump and display the error. Resistance values can vary but a reading close to zero ohms indicates the presence of water and a potential issue.

Symptoms:

The dishwasher displays a 'Leak Protect' error, often accompanied by beeping or a shutdown of the wash cycle. You might also notice water on the floor around the dishwasher.

Possible Causes:

Water leak within the dishwasher base
Faulty leak sensor
Drain pump malfunction causing backflow
Overfilling of the dishwasher
Issue with the float switch
Damaged or loose plumbing connections

Solution:

1

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

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

Inspect the base for standing water. Use a shop vac to remove any accumulated water.
4

Locate the leak sensor (typically a small, round sensor). Disconnect the sensor connector.
5

Check the sensor with a multimeter for continuity. An open circuit indicates a faulty sensor. Replace if necessary.
6

Temporarily bypass the sensor by connecting the two wires from the harness together. This is for testing ONLY and not a permanent fix.
7

Restore power and run a short cycle. Observe for leaks. If the 'Leak Protect' error disappears, the sensor was likely the issue.

Safety Warning:

Always disconnect power to the dishwasher before performing any repairs. High voltage (120V AC) is present within the appliance. Use caution when working near water and electrical components. Follow Lock Out/Tag Out (LOTO) procedures to prevent accidental power restoration during repair.

Prevention:

Regularly inspect water supply lines and drain hoses for cracks or leaks. Ensure proper leveling of the dishwasher to prevent water from accumulating in the base. Clean the dishwasher filter regularly to prevent drain clogs that can cause backflow.

Expert Tip:

To access the service mode on some GE dishwashers, press and hold the 'Start' and 'Heated Dry' buttons simultaneously for 5 seconds. This will allow you to run diagnostic cycles and check for error codes beyond the 'Leak Protect' indicator.

Frequently Asked Questions

•What is the typical resistance reading I should expect from a working leak sensor when it's dry?

A working leak sensor, when dry, should typically read an open circuit (infinite resistance) or a very high resistance value (e.g., several megaohms) on a multimeter.

•If I bypass the leak sensor and the dishwasher runs fine, but then the error returns after replacing the sensor, what else could be the issue?

If the error returns after replacing the sensor, double-check the wiring harness and connector to the sensor for any damage or corrosion. Also, re-inspect all plumbing connections and the drain pump for any new or intermittent leaks that might be triggering the new sensor.

•Where is the most common location for leaks in a GE dishwasher that would trigger the leak sensor?

The most common leak locations are around the drain pump housing, the water inlet valve, and the connection points of the spray arms. Also check the door seal for damage or debris that could prevent a tight seal.

GE Dishwasher Leak Protect Sensor Bypass: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance reading I should expect from a working leak sensor when it's dry?

•If I bypass the leak sensor and the dishwasher runs fine, but then the error returns after replacing the sensor, what else could be the issue?

•Where is the most common location for leaks in a GE dishwasher that would trigger the leak sensor?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: