What does Samsung Oven C-20 Error Code - Causes & Fix mean?

C-20 means the oven temperature sensor is open or shorted. Most fixes come down to replacing the oven temperature sensor.

How do I fix Samsung Oven C-20 Error Code - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with 20 active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for Samsung Oven C-20 Error Code - Causes & Fix?

The most frequently replaced parts for Samsung Oven C-20 Error Code - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is Samsung Oven C-20 Error Code - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

Samsung Oven C-20 Error Code - Causes & Fix

Samsung Oven C-20 Error Code — What It Means

C-20 is the code your Samsung range shows when the oven temperature sensor reads open or shorted. The control board watches that sensor to manage heat, so when the signal drops out of range the oven stops the cook to protect itself.

The sensor is a thin probe mounted inside the oven cavity. A healthy unit reads about 1080 ohms at room temperature. If it reads far off that value or shows no continuity, the board flags C-20.

Jump to Fix

Common Causes

Failed temperature sensor The probe element has drifted out of spec or opened internally and no longer reports a usable resistance.
Damaged sensor wiring A pinched, melted, or chafed harness lead between the sensor and the board reads as open or shorted.
Loose sensor connector A connector that has backed out or corroded at the board breaks the circuit the board expects to see.
Heat damage at the cavity Repeated high heat near the sensor mount can crack the probe sheath and short it against the cavity.
Control board fault Less often the input circuit on the main board misreads a good sensor and posts the code.

Step-by-Step Fix

Cut power at the breaker for one minute, restore it, and see if the code clears on its own.
Pull the range out and remove the back panel to reach the sensor harness.
Unplug the temperature sensor connector and inspect the pins for melt or corrosion.
Set a multimeter to ohms and measure the sensor. Expect roughly 1080 ohms at room temperature.
Replace the sensor if it reads more than about 200 ohms off that value or shows no continuity.
Inspect the harness from the sensor to the board for pinched or burnt insulation and reseat the connector.
If the sensor and wiring test good, suspect the main control board input.

Parts Often Needed

Part	Notes
Samsung oven temperature sensor (probe)	Amazon \| OEM part DG32-00002B fits many Samsung ranges. Confirm against your model number before ordering.
Oven sensor wire harness	Amazon \| Use when the harness shows melt or chafe rather than the probe itself.
Samsung range main control board	Amazon \| Last resort after the sensor and harness both test good.

When to Call a Pro

If the sensor reads in spec and the wiring looks clean, the fault points to the control board. Board diagnosis and replacement is fiddly and easy to misorder, so bring in a tech if you are not comfortable matching the board to your exact model.