F4
Amana
Oven temperature sensor circuit shorted
Oven displays F4 and beeps; may shut off or fail to start a cycle.
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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
Shorted oven temperature sensor, Sensor wiring harness shorted to chassis, Moisture in sensor connector, Failed EOC sensor input circuit
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before removing panels or touching wiring.
Step-by-step checks:
- Inspect sensor and wiring: Access the oven temperature sensor from inside the cavity or rear panel. Look for melted insulation, bare wires touching metal, or moisture around the connector.
- Test sensor resistance: Disconnect the sensor and measure resistance. At room temperature, it should be ~1050–1100 Ω. A reading near 0 Ω indicates a shorted sensor; replace it.
- Check for shorts to ground: With the sensor unplugged, test each sensor lead to chassis ground with a multimeter. Any continuity indicates a shorted harness; repair or replace the wiring.
- Control board evaluation: If sensor and harness are good but F4 persists, the EOC may be interpreting the signal incorrectly due to an internal short. Replace the EOC.
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Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor (RTD) or Main Harness
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