Written by
Adrian Soto Appliance Repair Content SpecialistPublished September 5, 2026Updated October 20, 2026
Error codeC-12 / C12
ApplianceMicrowave
Quick answer
C-12 (C12) is an error with the gas/easy/PH 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-12 / C12 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-12 is an error with the gas/easy/PH sensor on a Samsung microwave.
A Samsung microwave that shows C-12 is reporting an error with the gas/easy/PH sensor. Current-generation Samsung microwaves use this code.
Meaning of C12
Samsung’s list gives one description, an error with the gas/easy/PH sensor, for C-10 and C-11 together.
First steps
Turn the microwave off at the breaker or unplug it from the wall.
After contact with a spill or cooktop steam, leave the microwave alone until it has dried.
If it was not wet, simply wait 60 seconds, then switch it on again.
When the same code shows up again, request service.
For a Samsung microwave in Los Angeles, call (310) 896-4231 and describe what the display shows. Keep the model number handy, note that the display says C-12, and mention the restart you did. You can also read about 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.
