GE Dishwasher 1H Error Code Fix: Delay Mode... | appliancefaults.com

Technical Background:

The 1H error code on a GE dishwasher typically indicates a problem with the communication between the User Interface (UI) board and the Main Control Board (MCU). The MCU relies on consistent voltage paths and clear signals from the keypad. Pressing the start button multiple times can trigger unintended functions due to corrupted signals or faulty keypad membrane.

Symptoms:

The dishwasher displays error code 1H. Pressing the start button twice unexpectedly activates the delay start mode. The control panel may be unresponsive or erratic.

Possible Causes:

Faulty UI (User Interface) board
Damaged keypad membrane
Loose wiring connections to the UI board
Main Control Board failure
Incorrect voltage supply to the dishwasher
Software glitch in the MCU

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Open the dishwasher door and locate the UI board (usually behind the control panel).
3

Inspect wiring connections to the UI board for looseness or corrosion. Tighten or clean as needed.
4

Use a multimeter to test the voltage supply to the UI board. It should read approximately 120V AC.
5

If the voltage is correct and connections are secure, replace the UI board with a new one.
6

If the problem persists after replacing the UI board, suspect the Main Control Board. Replace it.
7

Restore power at the breaker panel and test the dishwasher functionality.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed. High voltage is present in the control panel area.

Prevention:

Avoid excessive force when pressing buttons on the control panel. Regularly clean the control panel to prevent buildup of grease and grime. Ensure proper voltage supply to the dishwasher by checking the outlet and breaker panel.

Expert Tip:

Try performing a hard reset by disconnecting the dishwasher from power for at least 5 minutes. This can sometimes clear temporary software glitches. You can also try the service mode, to access it, press and hold the 'Start' button, while simultaneously pressing the 'Cycle Select' button 5 times within 5 seconds. The display should change, indicating service mode entry. Use the 'Cycle Select' button to navigate and 'Start' to activate tests.

Follow-up Questions:

Frequently Asked Questions

•How do I test the keypad membrane?

Visually inspect the membrane for cracks or damage. You can also use a multimeter to check for continuity across the keypad contacts when buttons are pressed. Inconsistent readings indicate a faulty membrane.

•Where is the Main Control Board located?

The Main Control Board is typically located at the base of the dishwasher, behind a protective panel. You'll need a 1/4-inch nut driver to remove the panel.

•What voltage should I expect at the outlet?

The outlet should supply a stable 120V AC. Use a calibrated multimeter to verify the voltage.

GE Dishwasher 1H Error Code Fix: Delay Mode Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I test the keypad membrane?

•Where is the Main Control Board located?

•What voltage should I expect at the outlet?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: