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

Technical Background:

The F97 error code indicates a low-pressure condition or a problem with the pressure switch circuit. The main control unit (MCU) monitors the pressure switch to determine the water level. When the MCU detects an unexpected reading, it triggers the F97 error. The pressure switch acts as a simple open/close switch based on the water pressure. The MCU reads the voltage supplied from the pressure switch to verify water levels.

Symptoms:

The dishwasher displays an F97 error code, and may not fill correctly, or may stop mid-cycle.

Possible Causes:

Air leak in the pressure switch hose.
Defective pressure switch.
Clogged or restricted pressure switch hose.
Faulty main control board (MCU).
Low water supply pressure to the dishwasher.
Blocked or restricted sump area.

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Locate the pressure switch, typically found near the sump or lower portion of the dishwasher. Trace the hose connected to it.
3

Inspect the pressure switch hose for kinks, cracks, or leaks. Replace if damaged.
4

Disconnect the hose from the pressure switch and the sump. Clear any debris or clogs using a small brush or wire.
5

Use a multimeter to test the pressure switch for continuity. With the dishwasher empty, the switch should be open. When the dishwasher fills, the switch should close. If not, replace the pressure switch.
6

Check the water inlet valve for proper operation and adequate water flow. Confirm 120V AC to the valve during fill cycle.
7

If all components test good, the main control board (MCU) may be faulty. Replacement should be performed by a qualified technician.

Safety Warning:

Always disconnect power to the dishwasher before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures. High voltage is present in the dishwasher's electrical components.

Prevention:

Periodically inspect the pressure switch hose for any signs of wear or damage. Ensure the water supply line is free from kinks. Clean the sump area to prevent clogs.

Expert Tip:

On some GE models, you can enter service mode by pressing and holding the 'Start' and 'Select Cycle' buttons simultaneously for 5 seconds. This allows you to run diagnostic tests to verify the pressure switch operation.

Frequently Asked Questions

•What is the typical resistance value of a good pressure switch?

A functioning pressure switch should have near-zero resistance (continuity) when closed (filled with water) and infinite resistance (open circuit) when open (empty).

•Where can I find the tech sheet for my specific GE dishwasher model?

The tech sheet is often located behind the lower access panel or inside the control panel. You can also find it online by searching for your model number followed by 'service manual'.

•What voltage should I expect to see at the pressure switch connector?

Typically, you'll see a low voltage DC signal (5V DC or 12V DC) at the pressure switch connector from the main control board. Check the wiring diagram for your specific model.

GE Dishwasher Error Code F97: Pressure Switch Air Leak Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance value of a good pressure switch?

•Where can I find the tech sheet for my specific GE dishwasher model?

•What voltage should I expect to see at the pressure switch connector?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: