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Error code reference

Samsung Range Error Code C-d1

Door locking information error

Samsung codesSamsung range codes

Door locking information error — door lock mechanism is not functioning properly.

First step from the service manual

Disconnect power, open back cover, check whether harness has been connected with door lock switch and motor.

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

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What C-d1 means on a Samsung range

The C-d1 error code on a Samsung range indicates a door locking information error, meaning the control board is not receiving the expected signals from the door lock assembly. This error is specifically tied to the self-clean cycle, which requires the oven door to lock securely before high-temperature operation can begin. The door lock assembly consists of two main components: a door lock motor that physically drives the latch mechanism, and a door lock switch that confirms the latch position to the control board. When the board cannot confirm proper lock engagement or disengagement, it throws the C-d1 code and halts operation.

The most common entry point for diagnosis is the wiring harness connecting the door lock switch and motor to the main control board. A disconnected, pinched, or corroded connector at either the switch or motor will interrupt the signal loop entirely, producing this error. The harness runs from the lock assembly, typically located at the top front of the oven cavity, back through the unit to the control board housed in the rear panel area.

Beyond wiring issues, the door lock motor itself can fail mechanically or electrically, preventing the latch from completing its travel. The door lock switch can also fail, either sticking in one position or losing continuity, so the board never receives a confirmation signal. In some cases, physical obstructions in the latch track or misalignment of the door itself can prevent the mechanism from completing its cycle, triggering the fault even when all electrical components are intact.

Source: manufacturer service documentation.

Common causes of C-d1

  1. 01

    Disconnected or damaged wiring harness

    Wiring / connection

    The harness connecting the door lock switch and motor to the control board may have come loose, been pinched, or corroded. Disconnecting power and inspecting the harness connectors at both the lock assembly and the control board is the recommended first step.

  2. 02

    Failed door lock motor

    Part replacement

    The door lock motor drives the latch mechanism and can fail electrically or mechanically, preventing the latch from completing its full travel. If the motor does not run or stalls mid-cycle, the control board will log the C-d1 fault.

  3. 03

    Faulty door lock switch

    Part replacement

    The door lock switch signals the control board that the latch has reached the locked or unlocked position. A switch that has lost continuity or is stuck will prevent the board from receiving confirmation, triggering the error.

  4. 04

    Physical obstruction or latch misalignment

    Wiring / connection

    Debris in the latch track or a misaligned oven door can physically prevent the lock mechanism from completing its cycle, even when all electrical components are functioning. Inspect the latch track for buildup and check that the door closes evenly.

  5. 05

    Control board communication failure

    Part replacement

    If the wiring, motor, and switch all test correctly, the main control board may not be properly processing the door lock signals. This is a less common cause but should be considered after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about C-d1

What does C-d1 mean on a Samsung range?
C-d1 is a door locking information error on Samsung ranges, indicating that the door lock mechanism is not functioning properly. The control board expects to receive signals from the door lock switch and motor confirming that the oven door has locked or unlocked, but those signals are missing or incorrect. This error most commonly appears in relation to the self-clean cycle, which requires a confirmed door lock before it can operate.
Will resetting the range clear the C-d1 error?
Disconnecting power to the range for several minutes may temporarily clear the C-d1 code, but it will return if the underlying problem with the door lock assembly or wiring is not addressed. A reset is useful for confirming whether the error is intermittent or persistent, but it is not a permanent fix. The door lock harness, switch, and motor should all be inspected before relying on a reset.
Is it safe to use my Samsung range while the C-d1 error is active?
Standard baking and cooking functions may still be available while C-d1 is displayed, but the self-clean cycle cannot and should not be run until the door lock issue is resolved. Operating the self-clean cycle requires a properly secured door latch, and attempting to bypass or ignore this error during a self-clean cycle creates a safety risk. Resolve the door lock fault before using any high-temperature oven functions.
How do I fix the C-d1 error on a Samsung range?
Start by disconnecting power to the range, then remove the back cover and inspect the wiring harness connected to the door lock switch and motor, checking for loose, corroded, or damaged connectors. Reconnect any loose connectors and restore power to see if the error clears. If the wiring is intact, the door lock switch or motor may need to be tested for continuity and replaced if faulty. Clearing debris from the latch track is also worth checking before replacing any parts.
How much does it cost to repair a Samsung range C-d1 error?
If the issue is only a loose or disconnected harness, there may be no parts cost at all, just the time for diagnosis. Replacing a door lock motor or switch typically costs between $40 and $120 for the part, depending on the specific model. If a professional repair technician is needed, total repair costs including labor generally range from $100 to $250, with control board replacement on the higher end of that spectrum.

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