Samsung Microwave Error C-20
ā” Quick Answer: The Samsung microwave C-20 error indicates a malfunction related to the temperature sensor, commonly occurring during or immediately after a heating c... ā DIY Fixable
What Does Error C-20 Mean?
The Samsung microwave C-20 error indicates a malfunction related to the temperature sensor, commonly occurring during or immediately after a heating cycle. Symptoms include the error code displayed on the control panel, a failure to heat food, and unusual buzzing sounds. This issue is typically caused by a fault in the temperature sensor, which may be open or shorted, leading to the microwave locking out operation to prevent overheating.
Common Symptoms:
- Error displayed on microwave control panel
- Microwave may stop heating or lock out operation
- Occurs during or immediately after heating cycle
Possible Causes
- Temperature sensor fault (open or short) (high)
How to Fix Error C-20
DIY Fix Power cycle microwave and check operation
- Disconnect microwave from power for at least 60 seconds
- Reconnect power and attempt to run a simple heating cycle
- Observe if Cā20 returns
Technician Only Diagnose and replace temperature sensor or repair wiring
- Enter service mode or open microwave per model service manual
- Test temperature sensor resistance values and compare to spec
- Inspect wiring harness between temperature sensor and main PCB for continuity and damage
- Replace faulty temperature sensor or repair wiring as needed
Parts needed: Temperature sensor, Wiring harness/connectors
- If Cā20 code persists after power cycling
- If unit overheats or shows other fault codes
- Internal diagnostics indicate open/short sensor requiring replacement
Next step
Choose the next step for C-20
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
Model-compatible Microwave parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Technical Specifications
| wattage | 1000W |
|---|---|
| component | Magnetron |
| resistance | 1-3 ohms |
| part_number | DE74-20019A |
| voltage_rating | 120V AC |
Common Questions
What does C-20 error mean on Samsung microwave?
C-20 indicates a temperature sensor malfunction, causing heating issues and error display.
Can I fix Samsung microwave C-20 error myself?
Yes, try power cycling the microwave by disconnecting it for 60 seconds to see if the error returns.
How much does it cost to fix C-20 error?
Estimated repair costs range from $50 to $150, including parts and labor.
When should I call a technician for C-20?
Call a technician if the C-20 error persists after power cycling or if the unit shows other fault codes.
Sources & References
Data last verified: 2026-07-22
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