Samsung Oven Error C-20
⚡ Quick Answer: The Samsung Oven error code C-20 indicates a malfunction with the temperature sensor circuit. This error often occurs during preheating or cooking, le... ✅ DIY Fixable
What Does Error C-20 Mean?
The Samsung Oven error code C-20 indicates a malfunction with the temperature sensor circuit. This error often occurs during preheating or cooking, leading to failure to heat or incorrect temperature readings. You may also hear unusual clicking sounds, and the heating process may stop prematurely. The issue may be due to a faulty temperature sensor, loose wiring, or an internal control board fault.
Common Symptoms:
- Oven displays C-20 code on control panel during preheat or cooking
- Oven may fail to heat or shows incorrect temperature readings
- Heating process may stop prematurely or not start
Possible Causes
- Oven temperature sensor malfunction or failure (medium)
- Loose or faulty wiring between temperature sensor and control board (medium)
- Control board / PCB unable to read sensor due to internal fault (low)
How to Fix Error C-20
DIY Fix Power Reset and Basic Checks
- Turn off the oven and disconnect it from the power supply (unplug or switch off circuit breaker).
- Wait at least 30–60 seconds.
- Reconnect power and attempt to use the oven again.
- Observe whether the C-20 code clears.
DIY Fix Inspect for Simple Issues
- Confirm no buttons are stuck on the control panel, as control panel issues can sometimes trigger error codes indirectly.
- Check that the oven door is fully closed and that the oven is not overloaded with cookware.
- Wipe down the control panel gently to remove excess moisture or residue.
Technician Only Test and Replace Temperature Sensor
- Disconnect power to the oven at the breaker.
- Access the oven’s internal temperature sensor (usually at the rear of the oven cavity).
- Measure sensor resistance with a multimeter (compare against specification in service manual).
- Replace the sensor if readings are outside spec or if visibly damaged.
- Reconnect power and confirm error code is resolved.
Parts needed: Oven temperature sensor, possibly wiring harness
Technician Only Inspect Wiring and Control Board
- With power off, inspect wiring harness between sensor and control board for loose connectors or damaged insulation.
- Repair or replace damaged wiring as needed.
- If wiring is intact but error persists, test control board inputs and replace the board if recommended in the service manual.
Parts needed: Wiring harness, Control board (if necessary)
- If error persists after power reset and basic checks
- If you are uncomfortable opening the oven or working with internal electrical components
- If sensor testing or board diagnosis steps are needed
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.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
Model-compatible Oven 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.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Non-Scratch Cooktop Cleaner
A routine surface-care product. Confirm that it is approved for the specific glass, ceramic, enamel, or stainless finish.
Oven Thermometer
A diagnostic aid for comparing cavity temperature during a controlled check. It does not prove which internal component has failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does C-20 error mean on Samsung Oven?
C-20 indicates a malfunction in the temperature sensor circuit, causing heating issues.
Can I fix Samsung Oven C-20 error myself?
Yes, try a power reset and check for simple issues like stuck buttons or loose connections.
How much does it cost to fix C-20 error?
Repair costs range from ¥3,000 to ¥12,000+ for the sensor, excluding labor.
When should I call a technician for C-20?
Call a technician if the error persists after basic checks or if you're uncomfortable with repairs.
Sources & References
Data last verified: 2026-07-31
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