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Error code reference

Samsung Range Error Code C-22

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

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

First step from the service manual

Press OFF/CLEAR, and then restart the oven. If the problem persists, disconnect all power to the range for at least 30 seconds and then reconnect the power. If this does not solve the problem, call for service.

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

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What C-22 means on a Samsung range

The C-22 error code on a Samsung range indicates a fault condition with the sub PCB temperature sensor, which monitors oven temperature as part of a secondary control circuit. The error is triggered when the sub PCB sensor circuit reads as open (no continuity, indicating a broken or disconnected sensor) or as a short (a near-zero resistance reading indicating a wiring fault or failed sensor element). This sensor works alongside the main oven temperature sensor to provide accurate temperature data to the control board during cooking operations.

The sub PCB is a secondary printed circuit board that assists the main control board in managing oven functions. When its associated sensor fails to return a valid resistance reading within the expected range, the control board interprets this as either an open or shorted circuit and triggers the C-22 fault to prevent unsafe operation. Common triggers include a physically damaged sensor probe, a break in the wiring harness between the sensor and the sub PCB, corrosion at connector terminals, or a failed sub PCB itself.

Diagnosing this fault requires isolating whether the issue lies in the sensor, the wiring, or the sub PCB. A technician would typically disconnect the sensor leads and measure resistance across the sensor terminals with a multimeter. An open circuit reading or a near-zero resistance reading confirms sensor failure. If the sensor tests within spec, the wiring harness and the sub PCB connections should be inspected next for damage, corrosion, or loose terminals.

Source: manufacturer service documentation.

Common causes of C-22

  1. 01

    Failed sub PCB temperature sensor

    Part replacement

    The sensor probe itself may have failed, resulting in an open or shorted circuit. This is the most common cause and can be confirmed by measuring resistance across the sensor terminals with a multimeter.

  2. 02

    Broken or damaged wiring harness

    Part replacement

    The wiring between the sub PCB sensor and the control board may have a break, burn, or pinch point that interrupts the circuit. Inspect the harness visually for any signs of heat damage, fraying, or pinching near the oven cavity edges.

  3. 03

    Loose or corroded connector terminals

    Wiring / connection

    Connectors at the sensor or sub PCB may have worked loose or developed corrosion, causing an intermittent or failed connection. Unplugging and reseating connectors while checking for oxidation or debris can help identify this cause.

  4. 04

    Faulty sub PCB

    Part replacement

    If the sensor and wiring both test correctly, the sub PCB itself may have failed internally. This would require replacement of the board to restore normal operation.

  5. 05

    Temporary control board communication error

    Wiring / connection

    In some cases, a transient electrical glitch can trigger the C-22 code without an underlying hardware failure. A full power reset by disconnecting the range for at least 30 seconds may clear the fault if no physical component has failed.

See the test procedure for each cause

Frequently asked questions about C-22

What does C-22 mean on a Samsung range?
The C-22 code on a Samsung range indicates that the sub PCB temperature sensor is either open (no signal) or shorted (faulty signal) during oven operation. This sensor is part of a secondary circuit that helps the control board manage oven temperature. The range displays this code to prevent unsafe operation when it cannot get a valid temperature reading from that sensor. A reset may clear the code if it was caused by a temporary glitch, but a recurring code usually points to a failed sensor, wiring issue, or board fault.
Can I fix a C-22 error on my Samsung range myself?
The first step you can do yourself is press OFF/CLEAR and then unplug the range for at least 30 seconds before restoring power. If the code does not return, the issue may have been a temporary electrical fault. If the code comes back, diagnosing the problem further requires testing the sensor resistance with a multimeter and inspecting the wiring harness, which is best handled by a technician with experience in appliance repair.
Is it safe to use my Samsung range when the C-22 code is showing?
You should not continue using the oven while the C-22 error is active. The code indicates the control board cannot reliably monitor oven temperature through the sub PCB sensor, which means the oven cannot regulate heat accurately. Using the appliance in this state could result in overheating or unpredictable temperature behavior. Stop oven operation and address the fault before resuming use.
Will resetting my Samsung range clear the C-22 code?
A reset can clear the C-22 code if it was caused by a temporary glitch rather than a hardware failure. Press OFF/CLEAR on the control panel, then disconnect all power to the range for at least 30 seconds before plugging it back in. If the code reappears after the reset and a normal oven cycle, the underlying cause is a physical component fault that requires inspection and likely part replacement.
How much does it cost to repair a Samsung range with a C-22 error?
Repair costs for a C-22 fault vary depending on the failed component. A replacement sub PCB temperature sensor is typically a lower-cost part, while a sub PCB board replacement will cost more for the part alone. Adding a technician's labor, total repair costs can range from around $100 to $350 or more depending on your location, the specific parts needed, and the service provider. Getting a diagnostic visit estimate before authorizing repairs is a good practice.

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