Written by
Adrian Soto Appliance Repair Content SpecialistPublished September 5, 2026Updated October 20, 2026
Error codeC-20 / C-21 / C-22
ApplianceRange
Quick answer
C-20, C-21 and C-22 report a sensor malfunction on Samsung ovens and ranges. Restart first; cut power if it continues.
Model compatibility: Samsung reuses codes across series and model years, so C-20 / C-21 / C-22 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, C-21 and C-22 mean sensor malfunction.
C-20, C-21 and C-22 are information codes for a sensor malfunction on a Samsung oven or range. Models can differ in design and in which codes they show, so check the manual for your model number if your code is not listed.
Restart sequence
Turn the oven off and then restart it. Should the code stay, switch the power off for 30 seconds or more and reconnect it.
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.
