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Error code reference

LG Microwave Error Code E-36

Weight Sensor Door Open Error

LG codesLG microwave codes

Weight Sensor Door Open Error - door opens during sensor cooking.

First step from the service manual

Cancel the present mode and restart from the beginning.

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

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What E-36 means on a LG microwave

The E-36 error code on an LG microwave indicates a Weight Sensor Door Open Error. This fault is triggered specifically during a sensor cooking cycle when the microwave detects that the door has been opened before the cooking program has completed. Sensor cooking modes rely on a continuous, sealed cooking environment to accurately measure steam and humidity levels from the food. When that environment is interrupted by an open door mid-cycle, the control board registers an error and halts the program.

The sensor cooking system in LG microwaves uses a humidity or steam sensor to monitor cooking progress and automatically adjust time and power levels. This process requires the door to remain closed throughout the entire cycle. If the door is opened, even briefly, the sensor readings are disrupted and the control board cannot resume accurate monitoring. The door latch switch assembly and the control board work together to detect door position, and any signal indicating an open door during this active cooking phase will produce the E-36 fault.

The most straightforward resolution is to cancel the current cooking mode using the Stop or Cancel button and then restart the sensor cooking program from the beginning with the door fully closed. In many cases, this is simply the result of user action during cooking. However, if the error appears without the door being physically opened, the cause may be a faulty door latch switch, a misaligned door, or an issue with the control board misreading door status.

Source: manufacturer service documentation.

Common causes of E-36

  1. 01

    Door opened manually during sensor cooking

    Wiring / connection

    The most frequent cause is simply the user opening the microwave door during an active sensor cooking cycle. This immediately interrupts the program and triggers the E-36 error. Canceling and restarting the cycle from the beginning resolves it.

  2. 02

    Faulty or worn door latch switch

    Part replacement

    The door latch switch assembly tells the control board whether the door is open or closed. A worn, damaged, or intermittently failing switch can send a false open-door signal during cooking even when the door is physically shut, triggering E-36 without any user action.

  3. 03

    Misaligned or warped door

    Part replacement

    If the microwave door is misaligned, bent, or not seating flush against the cavity frame, the latch may not engage consistently. This can cause the control board to intermittently read the door as open during a sensor cycle.

  4. 04

    Damaged door hook or latch assembly

    Part replacement

    The plastic door hooks that engage the latch switches can crack or break over time. A broken hook may not fully depress the door switch, causing the control board to register an open-door condition during cooking.

  5. 05

    Control board fault

    Part replacement

    In rare cases, a malfunctioning control board may incorrectly interpret door switch signals and trigger the E-36 error even when all mechanical door components are functioning correctly. This is typically diagnosed after ruling out all other causes.

See the test procedure for each cause

Frequently asked questions about E-36

What does E-36 mean on a LG microwave?
E-36 is a Weight Sensor Door Open Error that appears when the microwave detects the door has been opened during an active sensor cooking cycle. The sensor cooking program requires a closed door to accurately monitor steam and humidity from the food. When the door opens mid-cycle, the control board halts the program and displays E-36. Pressing Cancel and restarting the cycle from the beginning is the recommended first step.
How do I fix the E-36 error on my LG microwave?
Start by pressing the Stop or Cancel button to exit the current mode, then restart the sensor cooking program from the beginning with the door kept closed throughout the entire cycle. If the error returns without you opening the door, inspect the door latch switches and door alignment for wear or damage. A faulty door latch switch or broken door hook may need to be replaced to resolve the issue permanently.
Will resetting the microwave clear the E-36 error?
Canceling the active cooking mode is the recommended reset action and will clear the E-36 error so you can restart. If the underlying cause is a physical action like opening the door during cooking, the error will not return as long as the door stays closed during the next sensor cycle. However, if a faulty door switch or misaligned door is causing a false signal, the error is likely to reappear even after resetting.
Is it safe to use my LG microwave after an E-36 error?
If the error was triggered by accidentally opening the door during cooking, it is safe to cancel the mode and restart the cycle. The microwave does not pose a direct safety risk from this error alone. However, if the error is occurring repeatedly without the door being opened, do not continue using the appliance until the door latch and switches have been inspected, as a faulty door switch can affect the safety interlock system.
How much does it cost to repair an E-36 error on a LG microwave?
If the fix is simply restarting the sensor cooking cycle, there is no cost involved. If a door latch switch or door hook assembly needs replacement, parts typically range from $10 to $40 depending on the model, with labor costs for a repair technician adding $75 to $150 or more. A control board replacement, if required, is significantly more expensive and may range from $100 to $250 or higher for parts alone.

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