GE Dishwasher F97 Error: Troubleshooting and Warranty... | appliancefaults.com

Technical Background:

The F97 error code in GE dishwashers indicates a problem within the heating circuit. The Main Control Unit (MCU) monitors the current flow to the heating element. If the MCU detects an abnormal current or no current, it will trigger the F97 error. This can be due to a faulty heating element, a problem with the wiring, a failed relay on the control board, or a faulty thermistor reporting incorrect water temperatures. Voltage paths include the 120V AC supply to the control board, through the relay, and to the heating element.

Symptoms:

The dishwasher displays an F97 error code. The dishes are not drying properly, or the water is not heating during the wash cycle.

Possible Causes:

Failed heating element
Faulty heating element relay on the control board
Wiring issue between the control board and heating element
Grounded heating element
Thermistor malfunction providing incorrect temperature readings
MCU (Main Control Unit) failure

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Locate the heating element at the bottom of the dishwasher tub. Disconnect the wires to the heating element.
3

Use a multimeter to test the heating element for continuity. A normal reading is typically between 15-25 ohms. An open circuit indicates a failed element.
4

Check the wiring harness between the control board and the heating element for any breaks or shorts. Repair or replace as needed.
5

Access the control board. Locate the heating element relay. Check for signs of burnt components or corrosion. If visible damage is present, replace the control board.
6

With the dishwasher powered on (carefully, observing safety precautions), use a multimeter to check for 120V AC at the heating element relay when the dishwasher is in a wash cycle. If voltage is present, the relay is likely functioning. If no voltage, the relay is faulty.
7

If the heating element and wiring are good and the relay is functional, the thermistor may be faulty. Locate the thermistor and test its resistance according to the service manual. Replace if out of specification.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any troubleshooting or repairs. Lock Out/Tag Out (LOTO) procedures must be followed. High voltage is present when the dishwasher is operating. Take extreme caution when testing live circuits.

Prevention:

Regularly check the dishwasher for any signs of leaks or damage. Ensure proper drainage to prevent mineral buildup on the heating element. Avoid overloading the dishwasher, as this can strain the heating element.

Expert Tip:

To check the thermistor reading without a meter, you can sometimes enter the service mode by pressing and holding the Start/Reset button for 5 seconds. The display will show diagnostic codes, including the current water temperature, which can indicate if the thermistor is reading correctly.

Frequently Asked Questions

•What is the typical resistance range for a GE dishwasher heating element?

The typical resistance range for a GE dishwasher heating element is between 15 and 25 ohms. Always refer to the service manual for your specific model.

•How do I access the control board on my GE dishwasher?

The control board is usually located behind the front control panel. You will typically need to remove the outer door panel and then unscrew the control panel to access the board. Disconnect power before doing so.

•Where is the thermistor located in a GE dishwasher?

The thermistor is typically located near the bottom of the dishwasher tub, often clipped onto or near the heating element. It may also be integrated into the sump assembly.

GE Dishwasher F97 Error: Troubleshooting and Warranty Coverage

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for a GE dishwasher heating element?

•How do I access the control board on my GE dishwasher?

•Where is the thermistor located in a GE dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: