GE Dishwasher F97 Error Code: Pressure Switch Air Leak... | appliancefaults.com

Technical Background:

The F97 error code on a GE dishwasher indicates a problem with the pressure switch circuit. The Main Control Unit (MCU) monitors the pressure switch to determine the water level inside the dishwasher. The pressure switch sends a signal (typically a change in voltage) to the MCU when the correct water level is reached. If the MCU doesn't receive the expected signal, or receives an inconsistent signal, it will trigger the F97 error. Voltage readings are typically 5V DC to the switch and a return signal varying between 0-5V DC.

Symptoms:

The GE dishwasher displays an F97 error code. The dishwasher may not fill with water properly or may stop mid-cycle. The wash cycles may be shorter than usual.

Possible Causes:

Faulty pressure switch
Air leak in the pressure switch hose or connection
Clogged or restricted pressure switch hose
Defective main control board (MCU)
Low water pressure to the dishwasher
Wiring harness issue between pressure switch and MCU

Solution:

1

Turn off the power to the dishwasher at the breaker panel. Verify 0V AC at the dishwasher's junction box with a multimeter.
2

Locate the pressure switch, usually near the sump area. Access may require removing the lower access panel using a 1/4-inch nut driver.
3

Visually inspect the pressure switch and its connected hose for any signs of damage, cracks, or loose connections.
4

Disconnect the pressure switch hose from the switch and the sump. Check for clogs or restrictions. Clean the hose with hot water and a small brush or replace if necessary.
5

Use a multimeter to test the pressure switch for proper operation. When empty, the switch should read open, and closed with pressure. Consult the service manual for exact resistance values. A typical resistance when closed is 1-2 ohms.
6

If the pressure switch tests faulty, replace it with a new one. Be sure to use the correct part number for your dishwasher model.
7

Reconnect all components, restore power at the breaker panel, and run a test cycle to confirm the F97 error is resolved. Check for leaks.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. Lock-out/Tag-out (LOTO) procedures should be followed. Dishwashers operate on 120V AC, which can cause serious injury or death if handled improperly.

Prevention:

Periodically check the pressure switch hose for clogs or damage. Use a dishwasher cleaner regularly to prevent buildup and maintain proper water flow.

Expert Tip:

Some GE dishwashers have a service mode. Entering service mode allows you to run diagnostic tests, including a pressure switch test, without running a full cycle. Refer to the service manual for the specific sequence for your model, often involving pressing a combination of buttons in a specific order (e.g., Select, Start, Select, Start).

Frequently Asked Questions

•How do I access the pressure switch on my GE dishwasher?

Accessing the pressure switch usually involves removing the lower access panel of the dishwasher. Depending on the model, you may also need to remove the kick plate and/or the inner door panel. Refer to your dishwasher's service manual for specific instructions and diagrams.

•What are the typical resistance readings I should expect from the pressure switch when it's working correctly?

A properly functioning pressure switch should exhibit an open circuit (infinite resistance) when no pressure is applied and a closed circuit (very low resistance, typically 1-2 ohms) when pressure is applied. Consult the dishwasher's service manual for the exact specifications for your model.

•Could low water pressure to my house cause the F97 error?

Yes, low water pressure to the dishwasher can contribute to the F97 error. If the water pressure is too low, the dishwasher may not fill adequately within the allotted time, causing the pressure switch not to activate correctly. Ensure you have at least 20 PSI of water pressure at the dishwasher.

GE Dishwasher F97 Error Code: Pressure Switch Air Leak Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the pressure switch on my GE dishwasher?

•What are the typical resistance readings I should expect from the pressure switch when it's working correctly?

•Could low water pressure to my house cause the F97 error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: