GE Dishwasher Leak Protect: Troubleshooting 999 Error... | appliancefaults.com

Technical Background:

The Leak Protect system uses a float switch in the dishwasher's base. When water accumulates, the float rises, activating the switch. This sends a signal to the Main Control Unit (MCU), which then triggers the 999 error code and shuts down the dishwasher. The MCU monitors the voltage from the float switch; a closed circuit (due to water) triggers the fault.

Symptoms:

The GE dishwasher displays error code 999 (Leak Protect) and may stop mid-cycle. You might find a small amount of water in the dishwasher's base when you open the door.

Possible Causes:

Excessive suds interfering with the float switch.
A leak from the pump or motor seal.
Cracked or damaged spray arms.
A blockage in the drain line causing backflow.
A faulty water inlet valve leaking when closed.
Condensation build-up triggering the sensor.

Solution:

1

Unplug the dishwasher or turn off the breaker at the breaker panel.
2

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

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

Check the float switch for free movement. It should move up and down without sticking. Clean any debris.
5

Examine the pump and motor assembly for leaks. Look for water stains or drips.
6

Inspect the drain hose and water inlet valve connections for tightness and signs of leakage.
7

After addressing potential leak sources, plug the dishwasher back in or turn on the breaker. Run a short cycle and monitor for recurrence of the error code.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock-Out/Tag-Out (LOTO) procedures should be followed. Some components may hold a 120V AC charge; use caution.

Prevention:

Use the recommended amount of dishwasher detergent. Periodically inspect the spray arms for cracks or damage. Check and clean the drain line for any blockages. Ensure proper air gap system for the drain line.

Expert Tip:

After addressing the leak, you can sometimes clear the error code by pressing and holding the 'Start' button for 5 seconds. This may vary by model, so consult the technical service manual.

Frequently Asked Questions

•How do I test the float switch to see if it's working correctly?

With the dishwasher unplugged, use a multimeter to check the continuity of the float switch. When the float is in the down position (no water), the switch should be open (no continuity). When the float is raised, the switch should be closed (continuity present). If the switch doesn't behave this way, replace it.

•What's the typical lifespan of a dishwasher pump, and how can I tell if it's failing?

A dishwasher pump typically lasts 7-10 years. Signs of failure include unusual noises during operation (grinding, humming), decreased water pressure in the spray arms, or leaking from the pump housing. You can also check the pump windings for continuity using a multimeter; an open circuit indicates a failed pump.

•Is there a way to access a diagnostic mode on my GE Leak Protect dishwasher to view more detailed error information?

Yes, many GE dishwashers have a service mode. The exact sequence varies by model, but a common method is to press a combination of buttons like 'Cycle Select' and 'Start' simultaneously for a few seconds. Refer to the technical service manual for your specific model for the correct sequence. Service mode can display detailed error codes and allow you to run diagnostic tests.

GE Dishwasher Leak Protect: Troubleshooting 999 Error Code Due to Water Leak

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I test the float switch to see if it's working correctly?

•What's the typical lifespan of a dishwasher pump, and how can I tell if it's failing?

•Is there a way to access a diagnostic mode on my GE Leak Protect dishwasher to view more detailed error information?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: