Samsung oven C-20 error code
C-20 means oven temperature sensor open. The cavity temperature sensor circuit is open — the electronics cannot read temperature, so heating is blocked..
Engineer usually needed · Fault type: Electrical/hardware
Safe checks, in order of likelihood
- Switch the oven off at the mains for 10 minutes and retry.
- If the code returns immediately, the sensor circuit is genuinely open.
- Do not keep retrying: a sensor fault can cause overheating if ignored.
Call a professional when…
The oven NTC sensor (or its wiring) is replaced. If the code returns after these checks, book a qualified engineer.
Parts usually involved
- Samsung oven NTC sensor for your model.