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Error code reference

Samsung Range Error Code C-d4

Door opening information error

Samsung codesSamsung range codes

Door opening information error — door open 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-d4 means on a Samsung range

The C-d4 error code on a Samsung range indicates a door opening information error, meaning the control system cannot properly detect or execute the door open and close mechanism. This code is specifically tied to the door lock assembly, which consists of a door lock motor and a door lock switch working together. The motor physically drives the locking bolt, while the switch provides positional feedback to the control board confirming whether the door is locked or unlocked. When the control board sends a command to the door lock motor and does not receive the expected confirmation signal from the switch, it triggers the C-d4 fault.

The most common source of this error is a wiring or harness issue between the door lock switch, the door lock motor, and the main control board. A loose connector, broken wire, or pinched harness can interrupt communication along this circuit. The first diagnostic step involves disconnecting power to the range, removing the back cover panel, and physically inspecting whether the harness connectors are fully seated at both the door lock switch and the door lock motor. A partially disconnected connector can cause intermittent or permanent loss of signal without any visible damage to the components themselves.

If the harness and connectors are intact and properly connected, the door lock switch or the door lock motor may have failed. The switch can wear out mechanically or develop an open circuit internally, and the motor can seize or burn out. Both components are part of the door lock assembly unit on most Samsung ranges and may need to be tested with a multimeter for continuity and proper resistance before determining which part requires replacement.

Source: manufacturer service documentation.

Common causes of C-d4

  1. 01

    Disconnected or loose harness connector

    Wiring / connection

    The wiring harness connecting the door lock switch or motor to the control board may not be fully seated. Inspecting and reseating all connectors at the door lock assembly after removing the back cover is the first step.

  2. 02

    Damaged wiring harness

    Part replacement

    A wire in the harness running to the door lock assembly may be broken, pinched, or burned, cutting off the signal between the switch or motor and the control board. Visual inspection along the full harness length can identify damage.

  3. 03

    Faulty door lock switch

    Part replacement

    The door lock switch provides positional feedback to the control board and can fail mechanically or electrically. A multimeter continuity test can confirm whether the switch is functioning correctly.

  4. 04

    Failed door lock motor

    Part replacement

    The door lock motor drives the locking bolt mechanism and can seize or burn out over time. If the motor does not move when commanded or shows no continuity, it will need to be replaced.

  5. 05

    Main control board fault

    Part replacement

    If the harness, switch, and motor all test correctly, the main control board may have failed and is not sending or reading signals properly. This is the least common cause and should be diagnosed only after ruling out all other components.

See the test procedure for each cause

Frequently asked questions about C-d4

What does C-d4 mean on a Samsung range?
The C-d4 code on a Samsung range indicates a door opening information error, meaning the control board cannot properly communicate with the door lock mechanism. The door lock switch and door lock motor work together to lock and unlock the oven door, particularly during self-clean cycles. When the control system loses feedback from these components, it triggers the C-d4 fault to prevent unsafe operation.
Will resetting the power clear the C-d4 error on my Samsung range?
Disconnecting power to the range for several minutes and restoring it may temporarily clear the C-d4 code, but if the underlying problem with the door lock harness, switch, or motor is not fixed, the error will return. A power reset is a useful first step to confirm whether the fault is intermittent or persistent, but it is not a permanent repair.
How do I fix the C-d4 error on a Samsung range?
Start by disconnecting power to the range and removing the back cover panel to inspect the wiring harness connected to the door lock switch and motor. Check that all connectors are fully seated and look for any visible wire damage. If the connections are secure, use a multimeter to test the door lock switch and motor for continuity. Replace any component that fails testing.
Is it safe to use my Samsung range while the C-d4 error is showing?
It is not recommended to operate the range while the C-d4 code is active, especially if you need to use the self-clean function. The error indicates the door lock mechanism is not functioning correctly, which means the oven door may not lock or unlock as intended during high-heat cleaning cycles. Address the fault before resuming normal use.
How much does it cost to repair a Samsung range with a C-d4 error?
If the fix is simply reseating a loose harness connector, there may be no parts cost involved, only your time. Replacing a door lock switch or motor typically costs between $30 and $100 for the part, depending on the specific model. If a professional technician is needed, labor costs can add another $100 to $200 or more depending on your location and the complexity of the repair.

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