What does LG microwave error code F-17 mean?

F-17 means the internal temperature sensor is malfunctioning. Unplug for 1 minute and restart. Professional service is required because microwaves contain dangerous high-voltage components.

F-17

LG Microwave Error Code F-17 — Temperature Sensor Error

Advanced Fix N/A (professional repair needed) No tools needed

What this means

The F-17 error code indicates the microwave's internal temperature sensor (thermistor) is not reading correctly. This sensor monitors the cavity temperature and protects against overheating. An open circuit, short circuit, or out-of-range reading will trigger F-17 and may prevent the microwave from operating.

Alternate codes: F17

Step-by-step fix

1 steps

Unplug and reset

Unplug the microwave for 1 minute, then plug back in and test.

When to call a professional

Temperature sensor replacement inside a microwave requires professional service due to the high-voltage components.

Related error codes

F-16

The microwave detected a heating abnormality.

Advanced Fix · N/A (professional repair needed)

Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.

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Parts you may need

Temperature Sensor (Thermistor)

Part #Varies by model · $15–$30

If the sensor has failed

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Quick Info

BrandLG

ApplianceMicrowave

Error CodeF-17

DifficultyAdvanced Fix

Est. TimeN/A (professional repair needed)