Samsung Oven Error Code C-21: How to Fix It

Q: What causes Samsung oven error code C-21?

Error code C-21 is caused by a faulty temperature sensor (RTD probe) that can no longer accurately measure oven temperature. The sensor may have failed due to age, heat damage, or electrical issues.

Q: Can I still use my Samsung oven with error C-21?

No, you should not use your oven with error C-21. The faulty temperature sensor prevents proper temperature control, which can result in undercooked food, overcooking, or potential safety hazards.

Q: How much does a Samsung oven temperature sensor cost?

Samsung oven temperature sensors typically cost between $25-60 depending on the specific model. Generic compatible sensors are often available at lower prices than OEM Samsung parts.

Q: How do I know if the temperature sensor is bad?

Test the sensor with a multimeter set to ohms. At room temperature (around 70°F), the sensor should read approximately 1,100 ohms. Readings significantly higher, lower, or infinite resistance indicate a faulty sensor.

Q: Will error code C-21 clear automatically after replacing the sensor?

Yes, error code C-21 should clear automatically once you install a properly functioning temperature sensor and the oven successfully completes a heating cycle.

Abstract

Samsung oven error code C-21 indicates a faulty temperature sensor (RTD) that cannot properly measure oven temperature. This critical error prevents your oven from heating correctly and requires sensor replacement to restore normal operation.