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Error code reference

GE Range Error Code 742

Cavity 1 door lock changed states unexpectedly.

GE codesGE range codes

Cavity 1 door lock changed states unexpectedly.

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.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What 742 means on a GE range

Error code 742 on a GE range indicates that the door lock mechanism on Cavity 1 (the primary oven cavity) has changed states without a corresponding command from the control board. In other words, the lock assembly reported a locked or unlocked position at a time when the control system did not initiate that transition. This is monitored through a lock position switch or sensor within the door latch assembly, which sends continuous feedback signals to the electronic control board about the lock's current state.

The most common root causes involve either a failing door lock assembly or a wiring harness problem between the lock assembly and the control board. The lock motor, position switches, and associated wiring are all candidates for inspection. Connector pins that have loosened, corroded, or shorted can cause the control board to receive erroneous state-change signals. The lock assembly itself can develop internal faults where the position switch triggers intermittently due to mechanical wear or debris interference.

Because this code relates to door lock behavior, it is most likely to appear during or after a self-clean cycle, which is when the door lock is actively engaged and subjected to high heat. Heat cycling over time can degrade both the wiring harness insulation and the lock assembly's internal components, making them more prone to sending unexpected signals to the control board.

Source: manufacturer service documentation.

Common causes of 742

  1. 01

    Faulty door lock assembly

    Part replacement

    The lock motor or internal position switch inside the latch assembly can wear out or develop an intermittent fault, causing it to report unexpected state changes to the control board. This is especially common on ranges with high self-clean cycle usage.

  2. 02

    Damaged or loose wiring harness

    Wiring / connection

    The wiring harness connecting the door lock assembly to the control board can develop loose connectors, broken wires, or heat-damaged insulation. Inspect the harness for visible damage, chafing, or pins that have backed out of their connector housing.

  3. 03

    Connector corrosion or poor contact

    Wiring / connection

    Corrosion on the lock assembly connector pins can cause intermittent or false signals to the control board. Disconnect the connector, inspect the pins, and clean any oxidation with electrical contact cleaner.

  4. 04

    Control board fault

    Part replacement

    If the door lock assembly and harness both check out without issues, the electronic control board itself may be misreading or misinterpreting the lock position signals. A control board fault is less common but should be considered after other components are cleared.

  5. 05

    Debris or obstruction in the lock mechanism

    Wiring / connection

    Food debris or buildup around the latch area can physically interfere with the lock assembly's movement, causing it to shift states unintentionally. Inspect the latch area and clean out any debris that could be causing mechanical interference.

See the test procedure for each cause

Frequently asked questions about 742

What does 742 mean on a GE range?
Error code 742 means the door lock on Cavity 1 changed states unexpectedly, without a command from the oven's control system. The control board monitors the lock's position at all times, and when it detects an unplanned state change, it triggers this fault code. The issue typically points to a problem with the door lock assembly, its wiring harness, or the connector between them.
Will pressing Cancel clear the 742 error on my GE range?
Pressing Cancel is the recommended first step and may reset the error if it was triggered by a temporary glitch. However, if the underlying cause is a failing lock assembly or a damaged wiring harness, the code will likely return after the reset. If the error reappears, a physical inspection of the lock mechanism and harness is needed.
Is it safe to use my GE range while error code 742 is showing?
Using the range for standard cooktop burners may be possible in some cases, but operating the oven cavity while a door lock fault is present is not advisable. An unreliable door lock creates uncertainty about whether the oven is properly secured, especially during high-heat operation. It is best to resolve the fault before running any oven function, particularly self-clean.
How much does it cost to fix a GE range error code 742?
If the fix involves only cleaning connectors or reseating a loose harness, the repair cost may be minimal, primarily your time. Replacing the door lock assembly typically costs between $80 and $200 in parts depending on the specific model, plus labor if a technician performs the work. A control board replacement, if needed, can range from $150 to $400 or more in parts alone.
How do I check the door lock assembly on a GE range for error 742?
Start by pressing Cancel to reset the system and observe whether the error returns. Next, inspect the wiring harness and connector at the door lock assembly, looking for loose pins, corrosion, broken wires, or heat damage to the insulation. If the harness appears intact, the lock assembly itself may need to be tested or replaced. Any inspection involving internal oven components should be done with the range unplugged from power.

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