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Error code reference

Samsung Range Error Code C-30

The main PCB temperature sensor is open when the oven is operating, or there is a short in the main PCB…

Samsung codesSamsung range codes

The main PCB temperature sensor is open when the oven is operating, or there is a short in the main PCB sensor.

First step from the service manual

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The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What C-30 means on a Samsung range

The C-30 error code on a Samsung range indicates a fault condition in the main PCB temperature sensor circuit. Specifically, the control board has detected that the sensor monitoring the PCB's own operating temperature is either open (meaning the circuit has broken and no signal is reaching the board) or shorted (meaning the circuit is completing in an unintended path, producing an invalid reading). This sensor is distinct from the oven cavity temperature sensor and is responsible for protecting the main printed circuit board from thermal damage during oven operation.

An open sensor condition typically results from a broken wire, a failed sensor element, or a corroded connector that has interrupted the signal path between the temperature sensor and the main PCB. A shorted condition, by contrast, usually points to damaged wiring insulation, moisture intrusion into the connector, or an internal failure within the sensor itself that causes two conductors to contact each other. Both conditions render the PCB temperature monitoring circuit non-functional, which the control board flags as a C-30 fault.

Because this fault involves the main PCB and its onboard temperature sensing circuit, the repair complexity is higher than a standard oven sensor replacement. The fault may originate in the wiring harness between the sensor and the board, in the sensor component itself, or within the main PCB circuitry. Samsung's guidance for this code directs users to contact a qualified service technician rather than attempt self-diagnosis, as component-level board testing is typically required to isolate the root cause.

Source: manufacturer service documentation.

Common causes of C-30

  1. 01

    Open or broken sensor circuit

    Part replacement

    A break in the wiring or a failed sensor element interrupts the signal path to the main PCB, causing the board to detect no reading from the temperature sensor. Inspect the wiring harness for visible breaks or burns.

  2. 02

    Shorted sensor wiring

    Part replacement

    Damaged insulation on the sensor wiring harness can allow conductors to contact each other, creating a short that the PCB reads as an invalid sensor signal. Look for melted, pinched, or chafed wiring near heat sources.

  3. 03

    Corroded or loose connector

    Wiring / connection

    Corrosion or a poorly seated connector at the sensor-to-board junction can interrupt or distort the sensor signal, triggering an open or short fault reading. Check all connectors related to the PCB temperature sensor for secure seating and corrosion.

  4. 04

    Failed PCB temperature sensor

    Part replacement

    The sensor component itself may have failed internally, producing either no output or an out-of-range signal. This requires testing the sensor's resistance and comparing it against the expected value for confirmation.

  5. 05

    Main PCB internal fault

    Part replacement

    If the wiring and sensor both test correctly, the fault may lie within the main PCB's own sensor input circuitry. This scenario typically requires board replacement or professional board-level repair.

See the test procedure for each cause

Frequently asked questions about C-30

What does C-30 mean on a Samsung range?
C-30 indicates that the main PCB temperature sensor is either open or shorted while the oven is operating. This sensor monitors the temperature of the range's control board electronics. The fault means the board cannot get a valid reading from that sensor, which prevents normal operation. Samsung directs users to contact a service technician for this code.
Can I fix the C-30 error on my Samsung range myself?
Samsung's guidance for C-30 is to call for professional service rather than attempt a DIY repair. The fault involves the main PCB and its sensor circuit, which requires component-level diagnostic testing to identify whether the problem is in the wiring, the sensor, or the board itself. Attempting repairs without the proper tools and knowledge risks further damage to the control board.
Will resetting my Samsung range clear the C-30 error?
Power cycling the range by unplugging it or turning off the circuit breaker for a few minutes may temporarily clear the code, but it will almost certainly return if the underlying sensor circuit fault is still present. A reset does not repair an open or shorted sensor circuit. The error will need to be diagnosed and the faulty component repaired or replaced.
Is it safe to use my Samsung range while the C-30 code is displayed?
It is not recommended to continue operating the range with an active C-30 error. This fault means the control board cannot monitor its own temperature, which removes a key protection designed to prevent the electronics from overheating. Continued use could risk damage to the main PCB or create a broader electrical fault. The range should be taken out of service until the issue is resolved.
How much does it cost to repair a Samsung range C-30 error?
Repair costs vary depending on the root cause. If the issue is a wiring harness or sensor replacement, parts and labor typically range from around $100 to $250. If the main PCB itself needs to be replaced, costs can range from $200 to $450 or more, depending on the specific model and local labor rates. A service technician will need to diagnose the fault before an accurate estimate can be provided.

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