Error Code Explained
What Does the Samsung C-22 Error Code Mean?
The C-22 error code on a Samsung oven or range indicates a fault with the lower oven cavity temperature sensor on double-oven models, or the broil/lower heating zone sensor on applicable configurations. The control board reads the sensor's resistance to regulate temperature. C-22 triggers when the sensor circuit returns an open or out-of-range resistance reading, preventing the lower oven or heating zone from operating safely.
C-22 is the lower-oven counterpart to C-21 (upper oven sensor fault). On single-oven ranges, C-22 may refer to a secondary sensor used for the broil or bake element zone depending on the model's sensor configuration.
Root Causes
Common Causes of the Samsung C-22 Error Code
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1Failed Lower Oven Temperature SensorThe RTD probe in the lower oven cavity has developed an open or short circuit internally. At room temperature, the sensor should read approximately 1,080–1,090 ohms — any significant deviation confirms failure.
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2Disconnected Sensor HarnessThe sensor connector has pulled free from the probe or from the control board, creating an open circuit in the sensor loop. This is especially common after service work or after the range has been transported.
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3Burnt or Pinched Sensor WiringThe sensor wires run through the oven cavity area and are exposed to high heat. Over time, wire insulation can degrade, causing a short or open that the control board reads as C-22.
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4Control Board Sensor Input FailureThe control board circuit that reads the lower sensor input can fail independently of the sensor. If the sensor and wiring test good, the board is the suspected cause.
Step-by-Step Guide
How to Troubleshoot the C-22 Error Code
Safety First: Always disconnect the Oven/Range from power before inspecting any internal components. Do not attempt electrical repairs. If in doubt, call a certified technician.
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1Access the lower oven sensorUnplug the range. Open the lower oven door and locate the temperature sensor probe on the back wall of the lower cavity. Remove the mounting screws and slide the sensor forward to reach the wire connector behind the back wall.
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2Test sensor resistanceDisconnect the two-wire connector and measure resistance across the sensor terminals with a multimeter. A good sensor reads 1,080–1,090 ohms at room temperature. Replace the sensor if the reading is 0 or OL.
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3Check wiring continuityWith the sensor disconnected, use a multimeter to test continuity along each wire from the sensor connector back to the control board connector. No continuity on either wire indicates a broken wire that needs repair or harness replacement.
Professional Service
When to Call a Samsung Technician
If sensor and wiring both test good and C-22 persists, the control board requires professional diagnosis. Do not operate the lower oven with C-22 active — the heating element runs without temperature regulation when the sensor circuit is open.
FAQ
Frequently Asked Questions — Samsung C-22
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C-21 is an upper oven sensor fault and C-22 is a lower oven sensor fault. On double-oven Samsung ranges, each oven cavity has its own dedicated temperature sensor. The codes identify which sensor circuit has failed.
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On double-oven models, yes — C-22 affects only the lower oven sensor circuit. The upper oven typically continues to operate normally. The lower oven will not heat until C-22 is resolved.
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Under normal use, Samsung oven sensors typically last 7–12 years. Running the self-clean cycle frequently accelerates sensor degradation because self-clean temperatures (around 900°F) stress the sensor element more than normal baking temperatures.
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