- Appliances
- Ovens
C20
Samsung C-20 on oven: sensor malfunction
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
Your Samsung oven shows C-20 (or C-21, C-22) because it detects a sensor malfunction. Turn the oven off and restart it; if it continues, turn the power off for at least 30 seconds and reconnect. If the code returns, contact a Samsung service centre.
Safety first
Stop and check this first
- If the code returns after the resets, stop cooking with the oven: a failing sensor can mean the temperature is not the one you set. Do not take it apart; that is a job for Samsung service.
Safe checks you can perform
- Turn the oven off and back on
- Cut the power for 30 seconds
- Exact number and manual check
Leave these tasks to a qualified professional
- Do not attempt this professional task: Measurement of the affected sensor
- Do not attempt this professional task: Heating test after repair
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Measurement of the affected sensor
What they doSamsung service measures the indicated sensor and its wiring with an instrument, with the oven de-energized, and compares it with the Samsung specification.
They must show youthe measured value against the specification.
In writingthe measurement, the replaced part with its reference and the final heating test.
Heating test after repair
What they doThe technician checks that the oven reaches the set temperature with no code.
They must show youthe oven preheating and reaching temperature.
In writingthe test result.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Turn the oven off and back on
- Who:
- you.
- How:
- turn the oven off and then restart it, as Samsung instructs.
- Result that matters:
- whether C-20 clears after the restart.
- If it clears and the oven works:
- it was a one off; watch for repeats.
- If it stays:
- move on to cutting the power for at least 30 seconds.
- Evidence to keep:
- a photo of the code on the display.
Evidence: Check out the information codes on my oven
Cut the power for 30 seconds
- Who:
- you.
- How:
- turn off the oven power for 30 seconds or more (circuit breaker, or the plug if accessible) and reconnect it, as Samsung instructs.
- Result that matters:
- whether the oven starts without C-20.
- If it does not return:
- it is solved for now; note the date.
- If it returns:
- Samsung refers you to its service centre; do not keep repeating the reset.
- Evidence to keep:
- a note of date and time of each occurrence and the model from the rating plate.
Evidence: Check out the information codes on my oven
Exact number and manual check
- Who:
- you.
- How:
- note whether the display shows C-20, C-21 or C-22 and find your model's manual, because Samsung warns codes can vary by model.
- Result that matters:
- giving service the exact code and its meaning on your oven.
- If the manual names the sensor:
- mention it when booking the repair.
- If it is not in the manual:
- use Samsung's general table and contact its service centre.
- Evidence to keep:
- a photo of the code and a screenshot of the manual.
Evidence: Check out the information codes on my oven
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Samsung
- Product type
- Ovens
Known code variants
- C20
- C-21
- C-22
- horno Samsung C-20
- Samsung C-20
- Samsung oven C-20
What it means
Samsung groups C-20, C-21 and C-22 in its oven information code table as sensor malfunctions. The table does not say which sensor each number refers to, so the code points towards temperature sensing without identifying the part. Samsung says most codes clear with a reset and that if any keep appearing you should contact its service centre. The code alone does not prove a sensor is faulty.
Warnings and stop conditions
- Mediumeditorial warning
If the code returns after the resets, stop cooking with the oven: a failing sensor can mean the temperature is not the one you set. Do not take it apart; that is a job for Samsung service.
Evidence: Check out the information codes on my oven
Symptoms and causes
Probable causes · in order
- One off sensor warningPossible
The code clears after turning off and on or cutting power for 30 seconds, and the oven heats normally.
Evidence: Check out the information codes on my oven
- Sensor or sensor connection faultPossible
The code returns after the resets; only Samsung service can measure the sensor and confirm it.
Evidence: Check out the information codes on my oven
Virtual technician
Does C20 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Check out the information codes on my oven
Samsung · 2026 · official_doc
Was this entry useful?