Written by
Adrian Soto Appliance Repair Content SpecialistPublished September 5, 2026Updated October 20, 2026
Error codeC-20 / C20
ApplianceMicrowave
Quick answer
C-20 (C20) is an error with the temperature sensor on a Samsung microwave. Unplug, let it dry or wait, then request service if it returns.
Model compatibility: Samsung reuses codes across series and model years, so C-20 / C20 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
C-20 is an error with the temperature sensor on a Samsung microwave.
Samsung microwaves use C-20 to report an error with the temperature sensor. It belongs to the current Samsung microwave code list.
C-20 on a Samsung microwave
In the table, C-21 and C-22 share one line with it, and the wording for that line is an error with the temperature sensor.
Steps for the owner
Cut the power first: pull the plug or turn the breaker off.
When moisture has recently touched the electronics (a spill, cooktop steam), wait for it to dry.
If it was not wet, simply wait 60 seconds, then switch it on again.
Should C-20 come back, the manual says to request service.
Our Los Angeles team handles Samsung microwave calls, and you can reach it at (310) 896-4231. Tell us the code, give the model number, and say whether the unplug-and-wait reset changed anything. More on microwave repair.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
