C-21
Microwave over-temperature condition
Samsung identifies C-21 as a high-temperature condition during microwave operation.
What this code means
Samsung identifies C-21 as a high-temperature condition during microwave operation.
Possible causes
- Microwave temperature above operating limit
- Cooling or airflow problem
- Temperature sensing or control fault
Common symptoms
- C-21 displayed
- Microwave stops operation
- Appliance may feel unusually hot
Checks to make
- Unplug the microwave
- Allow it to cool fully
- Restart only after adequate cooling
- Contact Samsung service if the code returns
Safety
- If there is smoke, burning smell or evidence of overheating, stop using the microwave and disconnect power if safe.
Model notes
Samsung lists C-21 and E-24 for the same high-temperature condition on supported models.