For the Samsung Oven & Range families covered by the source set, **C23** means **temperature sensor issue**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. A display code is evidence from the control system, not a component test result. That distinction matters because a connector, supply condition, obstruction, or feedback signal can mimic a failed component. The recorded display form is **C23**. Search normalization stores it as **C23** 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:
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Error codeC23
ApplianceOven & Range
Quick answer
Temperature sensor issue.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so C23 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
For the Samsung Oven & Range families covered by the source set, **C23** means **temperature sensor issue**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. A display code is evidence from the control system, not a component test result. That distinction matters because a connector, supply condition, obstruction, or feedback signal can mimic a failed component. The recorded display form is **C23**. Search normalization stores it as **C23** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
While C23 is active, the control may stop or limit operation because a temperature reading is missing or implausible.
One clue that supports the C23 diagnosis is that heating, cooling, drying, or defrost behavior can become inconsistent.
Depending on the exact model, the display can return at a similar stage each time the affected sensor is checked.
The C23 display becomes more meaningful if c23 appears on the range/oven and the related cooking, sensing, door, or control function can be limited.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Temperature sensor issue
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
As an external check for C23, record when the code appears and whether the appliance had just heated, cooled, or defrosted.
To rule out an accessible cause, confirm vents, doors, filters, and ambient conditions are normal where they affect the sensor reading.
Before opening any service area, use the exact model manual before assuming the sensor itself is defective.
The next non-invasive check is to record the exact code and model number.
The next non-invasive check is to check door/divider/pan placement, vent obstruction, settings, and household power only when relevant.
The next non-invasive check is to do not perform live high-voltage internal testing; request service if the code reappears.
Important safety warning. Stop for arcing, repeated breaker trips, uncontrolled heating, damaged wiring, or gas odor. Internal live-voltage and gas-system diagnosis is not a homeowner check. For C23, 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 C23 keeps returning, record the stage at which it reappears so the technician can test the temperature sensor diagnostic 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.
Resetting can clear a temporary state, not a persistent issue. If **C23** comes back, preserve the code and move to the safe checks or model-specific service path.
That depends on the accompanying symptom. A code with no safety hazard may allow a short diagnostic check, but **C23** should not be ignored if performance is deteriorating or the display keeps returning.
Treat **C23** as a starting point, not a replacement instruction. Wiring, feedback signals, operating conditions, and electronic controls can mimic a failed component.
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 **Oven & Range C23** separate from same-looking codes used by other Samsung appliance families.
