GE · Dishwasher

F3

Stuck Relay

Severity

Medium

The error code F3 on your GE Dishwasher indicates a specific system failure categorized as "Stuck Relay". This guide walks you through the most likely causes and the correct repair sequence.

Owner's Summary

GE's F3 means the heater has been running longer than it should. The machine stops as a safety measure. The temperature sensor is often the cause — if it reads falsely cold, the heater runs endlessly trying to reach a temperature it thinks it never achieves.

Symptoms

GE dishwasher overheating water, running continuously, F3 error code

Common Causes

Heater relay on PCB stuck closed
Thermistor reading falsely cold
PCB firmware error
Wiring short in heater circuit

How to Fix

1 Test thermistor resistance at room temperature
2 Replace thermistor if reading below 5k ohms
3 Inspect PCB for burn marks around heater relay
4 Replace PCB if relay is visibly damaged

Tools You'll Need

Multimeter Flashlight

These are simple, low-risk fixes most homeowners can do with tools already in a basic toolbox.

Technical Explanation

F3 is generated when the heating element runs beyond the maximum allowable time without the thermistor confirming target temperature. This indicates a thermistor failure, stuck relay, or heater operating at reduced efficiency due to scale buildup.

Is It Safe to Keep Using?

Unplug until resolved. Continuous heater operation can warp plastic components.

Technician's Pro Tip

Check the thermistor first — it is a $15–$40 part. A thermistor that reads below 5k ohms at room temperature has failed to a low resistance state and is telling the board the water is extremely cold. This causes the heater relay to remain closed indefinitely.

Related Codes

E11 — GE Washing Machine

Water Fill Issue

High

E21 — GE Washing Machine

Slow Drain or Drain Fault

High

E31 — GE Washing Machine

Pressure Sensor Fault

Medium

Frequently Asked Questions

What does error code F3 mean on a GE Dishwasher?

Code F3 on a GE Dishwasher indicates "Stuck Relay." In practice, the most common trigger is heater relay on PCB stuck closed. Severity is rated medium, and typical repair costs range from $15 to $280.

Can I fix F3 myself, or do I need a technician?

Many cases of F3 can be resolved without a technician. The first step to try: test thermistor resistance at room temperature. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code F3 showing?

Unplug until resolved. Continuous heater operation can warp plastic components.

How much does it cost to repair F3 on a GE Dishwasher?

Repair costs for code F3 typically range from $15 to $280. Thermistor: $15–$40; PCB: $100–$280. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$15 – $280

Thermistor: $15–$40; PCB: $100–$280