Samsung Microwave code **C-22** is associated with **temperature sensor error**. The display identifies the system or condition the control detected, but it does not by itself prove which individual part should be replaced. The useful diagnostic value of the code is the subsystem it identifies. A good repair process confirms the symptom, checks the accessible external conditions, and then follows the model-specific circuit only if the display returns. The recorded display form is **C-22**. Search normalization stores it as **C22** while preserving the characters a homeowner actually sees.
Reviewed by Ethan Mercer · Last reviewed August 17, 2026
Written by
Ethan Mercer Appliance Repair Content SpecialistPublished August 17, 2026Updated August 22, 2026Technically reviewed August 17, 2026
Content status:
Verified
Error codeC22
ApplianceMicrowave
Quick answer
Temperature sensor error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so C22 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
Samsung Microwave code **C-22** is associated with **temperature sensor error**. The display identifies the system or condition the control detected, but it does not by itself prove which individual part should be replaced. The useful diagnostic value of the code is the subsystem it identifies. A good repair process confirms the symptom, checks the accessible external conditions, and then follows the model-specific circuit only if the display returns. The recorded display form is **C-22**. Search normalization stores it as **C22** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
The C-22 display becomes more meaningful if the control can stop or limit operation because a temperature reading is missing or implausible.
When the C-22 condition is present, heating, cooling, drying, or defrost behavior can become inconsistent.
A symptom that fits C-22 is that the display can return at a similar stage each time the affected sensor is checked.
While C-22 is active, c-22 appears and the microwave can stop or limit the function associated with temperature sensor error.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Temperature sensor error
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
The next non-invasive check is to record when the code appears and whether the appliance had just heated, cooled, or defrosted.
A safe owner-level check is to confirm vents, doors, filters, and ambient conditions are normal where they affect the sensor reading.
Before requesting service for C-22, use the exact model manual before assuming the sensor itself is defective.
As an external check for C-22, record the exact code and model number.
Before opening any service area, power the microwave off for 60 seconds only if Samsung's model guidance allows a reset.
A safe owner-level check is to do not remove the outer cabinet or access internal high-voltage components.
Important safety warning. Do not remove the microwave outer cabinet. High-voltage components can retain dangerous energy even after the appliance is unplugged. For C-22, stop troubleshooting immediately if the symptom crosses into a safety hazard rather than a normal diagnostic condition.
Get help
When to request repair service
Persistent temperature-sensor codes usually require resistance/connection checks at the sensor, harness, and control—work best done with the model-specific service procedure. If C-22 keeps returning, record the stage at which it reappears so the technician can test the temperature sensor error path instead of replacing parts by guesswork.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You can try the one reset Samsung documents for the model, but **C-22** returning afterward means the condition still exists. Note the operating stage instead of cycling power repeatedly.
Do not keep operating the appliance through a hazardous symptom just to see whether **C-22** clears. If there is heat, water, electrical, gas, or food-safety risk, stop and arrange diagnosis.
The code alone is not enough to justify a part. **C-22** should narrow testing to the affected function; the final cause still has to be verified on the exact model.
The same-looking code can be reused on another Samsung appliance family or reformatted by region/model year. Match the appliance type and exact model before applying a meaning. This page therefore keeps **Microwave C-22** separate from same-looking codes used by other Samsung appliance families.
