mypros+
Error code reference

GE Range Error Code 743

Cavity 1 door lock failed to change to expected state.

GE codesGE range codes

Cavity 1 door lock failed to change to expected state.

First step from the service manual

Press cancel to reset system. Check lock assembly and harness.

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

MyPros+ Max

Get the full diagnostic procedure for 743.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What 743 means on a GE range

Error code 743 on a GE range indicates that the Cavity 1 door lock mechanism failed to transition to its expected state during a lock or unlock cycle. This typically occurs during or after a self-clean cycle, when the control board sends a signal commanding the door lock motor to engage or disengage, and the feedback from the lock assembly does not confirm the expected position within the allotted time. The control board monitors the lock assembly through a position switch or sensor built into the latch mechanism, and when that confirmation signal is absent or incorrect, the fault is triggered.

The door lock assembly on GE ranges is an electromechanical component consisting of a small motor, a latch arm, and one or more position switches. A failure can originate in the lock motor itself, the position switch contacts, or the wiring harness that connects the assembly to the main control board. Physical obstructions around the door latch opening can also prevent the latch arm from completing its travel, causing the switch to never register the correct state.

Diagnosis should begin with a cancel reset to clear the active fault and allow the system to reinitialize. If the code returns, inspect the lock assembly for visible damage, debris, or binding. Check the wiring harness between the lock assembly and control board for loose connectors, pinched wires, or corrosion at the terminals. Resistance readings across the lock motor windings and position switch contacts can help isolate whether the fault is electrical or mechanical.

Source: manufacturer service documentation.

Common causes of 743

  1. 01

    Faulty door lock assembly

    Part replacement

    The lock motor or internal position switch within the assembly can fail, preventing the latch from completing its travel or reporting the correct state to the control board. This is the most frequent hardware cause of code 743.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The harness connecting the lock assembly to the control board can develop loose connectors, broken wires, or corroded terminals, interrupting the signal between the two components. Inspect each connector at both ends for secure seating and clean contact surfaces.

  3. 03

    Physical obstruction at the latch

    Wiring / connection

    Food debris, grease buildup, or a warped door frame can block the latch arm from moving fully into the locked or unlocked position. Visually inspect the latch area and clean away any debris that may be impeding movement.

  4. 04

    Failed main control board

    Part replacement

    If the control board is not sending the correct drive signal to the lock motor, or is failing to read the position switch feedback correctly, the board itself may be at fault. This is less common and should be considered after ruling out the lock assembly and harness.

  5. 05

    Intermittent transient fault

    Wiring / connection

    Occasionally a power fluctuation or brief software glitch during a self-clean cycle can cause a one-time lock state mismatch. A cancel reset may clear the code without any further intervention needed.

See the test procedure for each cause

Frequently asked questions about 743

What does 743 mean on a GE range?
Error code 743 means the oven door lock for Cavity 1 failed to reach its expected position during a lock or unlock cycle. The control board commands the door lock assembly to engage or disengage and monitors feedback from a position switch to confirm the move completed. When that confirmation does not arrive, the fault is logged. This most often occurs in connection with the self-clean function.
Will pressing Cancel fix error code 743 on my GE range?
Pressing Cancel is always the correct first step because it resets the system and allows the lock mechanism to attempt another cycle. If the fault was caused by a temporary glitch or power fluctuation, the reset may clear it permanently. However, if a mechanical or electrical problem exists with the lock assembly or harness, the code will return and further diagnosis will be required.
Is it safe to use my GE range when error code 743 is displayed?
Standard baking and broiling functions may still be available depending on the current lock state, but you should not attempt to run another self-clean cycle until the fault is resolved. An unresolved door lock issue means the oven cannot guarantee the door is properly secured during high-temperature cleaning. Addressing the fault before running self-clean again is strongly recommended.
How much does it cost to repair error code 743 on a GE range?
If the repair only requires cleaning debris from the latch area or reseating a loose connector, the cost is minimal. Replacing a door lock assembly typically falls in the range of $60 to $150 for the part, plus labor if a technician is hired. A main control board replacement, if that is the root cause, generally runs $150 to $350 or more for the part alone.
How do I diagnose error code 743 on a GE range?
Start by pressing Cancel to reset the system and observe whether the code returns. Next, inspect the door latch area for obstructions, grease buildup, or visible damage to the latch arm. Check the wiring harness between the lock assembly and the control board for loose connectors or damaged wires. If the harness and latch area appear normal, the lock assembly itself or the control board should be tested further, potentially with a multimeter to check the motor windings and position switch contacts.

Related GE range codes

All GE range codes
View all 303 GE range codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass