F3
GE Profile
Temperature Sensor / Heating Error
Dishwasher displays F3; may not heat or may show sanitize not achieved.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open or shorted thermistor, Failed heater, Wiring issue between sensor and control, Control board temperature circuit fault
How to Fix / Troubleshooting
Safety: Disconnect power before testing or replacing components.
Steps:
- 1. Inspect thermistor and wiring: Locate the temperature sensor in the sump. Check for damage and secure connections.
- 2. Test thermistor resistance: With a multimeter, compare resistance to GE specifications at room temperature.
- 3. Check heater continuity: Test the heating element for an open circuit.
- 4. Replace failed parts: Replace the thermistor or heater as indicated by test results.
If F3 persists, the main control board may be defective and should be replaced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Temperature Sensor (Thermistor)
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