Written by
Nadia Okafor Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeC-70 / C70
ApplianceMicrowave
Samsung microwaves report a steam sensor error through the code C-70, which some displays show as C70. The neighbours C-71 and C-72 are worded identically.
C-70: key details
Shows as: C-70, sometimes C70
Samsung calls it: steam sensor error
Series: The listing applies to the present generation of Samsung microwaves.
Power-cycle checklist
Shut the microwave down completely by pulling its plug or flipping the breaker. Any wetness, whether a spill or cooktop steam, has to dry before you go further. When nothing is wet, a 60-second wait is all that is needed before power goes back on. When the code returns, requesting service is what Samsung advises.
Neighbouring Samsung entries
C-71, which Samsung describes as a steam sensor error. C-72 is the entry for a steam sensor error.
Getting repair help in the Bay Area
A code that survives the reset is a reason to book a visit in San Francisco or across the Bay Area. Open Samsung microwave repair or dial (415) 969-6153, and have C-70, the model number and the steps you tried at hand.
Model compatibility: Samsung reuses codes across series and model years, so C-70 / C70 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-70 signals a steam sensor error in Samsung's microwave code list.
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.
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