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Samsung Ovens & Ranges2017–present

Error Code C-d1

Door lock mispositioned or malfunctioning

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: C-d1

What This Means

Door lock motor harness disconnected; Door lock switch failure; Door lock motor resistance out of spec; Micro switch defect

What actually causes this:

Door lock motor not responding to commands, micro switch failure, or loose connections preventing proper door locking

First Thing to Check

Verify all harnesses connected to door lock motor and switch are properly seated

Parts Involved

Door Lock MotorMicro SwitchDoor Latch Assembly

How to Fix

  1. 1

    Disconnect power and check door lock harness connection

  2. 2

    Measure door lock motor resistance at room temperature

  3. 3

    Check if resistance is between 1600-2200 Ohms

  4. 4

    Test door locking switch operation

  5. 5

    Measure lock motor coil resistance (1750-1850 Ohms normal)

This Error Applies To

Samsung DOB30M977 Series Ovens & Ranges (2017) (2017–present)

Service manual exact match: DOB30M977DService manual exact match: DOB30M977S

Related Error Codes

C-F2

Touch panel control communication failure

C-30

PCB temperature sensor open or short circuit

C-A2

Cooling fan motor malfunction

C-20

Oven temperature sensor circuit is open

C-31

PCB overheating - internal temperature critically high

C-21

Oven overheating - internal temperature critically high

C-23

Meat probe sensor short circuit detected

C-72

Steam drain system not working - water remains after cycle

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