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

  1. Turn off the oven and disconnect it from the power supply (unplug or switch off circuit breaker).
  2. Wait at least 30–60 seconds.
  3. Reconnect power and attempt to use the oven again.
  4. Observe whether the C-20 code clears.

DIY Fix Inspect for Simple Issues

  1. Confirm no buttons are stuck on the control panel, as control panel issues can sometimes trigger error codes indirectly.
  2. Check that the oven door is fully closed and that the oven is not overloaded with cookware.
  3. Wipe down the control panel gently to remove excess moisture or residue.

Technician Only Test and Replace Temperature Sensor

  1. Disconnect power to the oven at the breaker.
  2. Access the oven’s internal temperature sensor (usually at the rear of the oven cavity).
  3. Measure sensor resistance with a multimeter (compare against specification in service manual).
  4. Replace the sensor if readings are outside spec or if visibly damaged.
  5. Reconnect power and confirm error code is resolved.

Parts needed: Oven temperature sensor, possibly wiring harness

Technician Only Inspect Wiring and Control Board

  1. With power off, inspect wiring harness between sensor and control board for loose connectors or damaged insulation.
  2. Repair or replace damaged wiring as needed.
  3. 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)

🛑 When to Call a Pro:
  • 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

Technical Specifications

wattage 3000W
component Heating Element
resistance 10-30 ohms
part_number DG94-00520A
voltage_rating 240V AC

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: 2026-01-10

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