GE Dishwasher F97 Error: PCB Replacement Guide - Solar... | appliancefaults.com

Technical Background:

The F97 error code in GE dishwashers indicates a problem within the heater circuit. The main control board (MCU) monitors the heater relay and the heater element's performance. The MCU uses feedback from the thermistor to regulate the heater. When the MCU detects an anomaly in the heater circuit's voltage path or resistance, it triggers the F97 fault code.

Symptoms:

The GE dishwasher displays an F97 error code. The dishwasher may not heat the water correctly, dishes may not be cleaned effectively, or the cycle may be interrupted. The dishwasher might also exhibit no heat at all during the wash cycle.

Possible Causes:

Burnt heater relay on the main PCB
Faulty heater element
Wiring harness damage between the PCB and heater
Overheating due to restricted water flow
Software glitch causing false F97 error
Defective thermistor reporting incorrect temperature

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

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

Locate the main PCB (usually in the lower control area).
4

Visually inspect the PCB for burnt components, specifically around the heater relay.
5

Using a multimeter, check the heater element for continuity. A reading of approximately 15-25 ohms is typical.
6

If the PCB shows signs of burning, replace the entire main PCB with a new, compatible GE part.
7

Reconnect power and run a test cycle to confirm the F97 error is resolved.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before attempting any repairs. Follow Lock-Out/Tag-Out (LOTO) procedures. The dishwasher operates on 120V AC, which can cause severe electric shock or death.

Prevention:

Regularly clean the dishwasher filter to ensure proper water flow. Avoid overloading the dishwasher to prevent strain on the heating element. Use a dishwasher cleaner monthly to prevent mineral buildup on the heating element.

Expert Tip:

Some GE dishwashers have a service mode. To access it, press and hold the Start and Cycle Select buttons simultaneously for 5 seconds. This mode can display detailed error history and allow for component testing, including the heater circuit.

Frequently Asked Questions

•How do I identify the correct replacement main PCB for my GE dishwasher model?

Locate the model number on the dishwasher's door or frame. Use this model number to search for compatible main PCB replacements online or at appliance parts retailers. Ensure the replacement PCB is specifically designed for your dishwasher model.

•What is the average lifespan of a GE dishwasher main PCB?

The lifespan of a GE dishwasher main PCB can vary depending on usage and environmental factors, but generally, it lasts between 5 to 10 years. Power surges, moisture, and frequent use can shorten its lifespan.

•If the heater element tests okay, what else could cause a false F97 error code?

A faulty thermistor could be reporting incorrect temperature readings to the main PCB, triggering the F97 error. Also, check the wiring harness between the heater and the PCB for any signs of damage, corrosion, or loose connections. A software glitch in the main PCB can also sometimes cause a false error, although this is less common.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I identify the correct replacement main PCB for my GE dishwasher model?

•What is the average lifespan of a GE dishwasher main PCB?

•If the heater element tests okay, what else could cause a false F97 error code?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: