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Error code reference

LG Microwave Error Code E-24

Over temperature error

LG codesLG microwave codes

Over temperature error - Oven internal temperature has exceeded safe limits, typically after using Convection mode followed by microwave mode.

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Check Sensor and Heater

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

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What E-24 means on a LG microwave

The E-24 error code on an LG microwave indicates an over-temperature condition in which the oven's internal cavity temperature has exceeded its safe operating threshold. This error is specifically linked to the thermal monitoring system, which uses a temperature sensor to continuously track heat levels inside the oven cavity. When the sensor detects a reading beyond the programmed safety limit, the control board triggers E-24 and halts operation to prevent component damage or potential hazards.

This error most commonly occurs when a user runs Convection mode, which uses a heating element to reach high baking or roasting temperatures, and then immediately switches to microwave mode without allowing adequate cool-down time. The residual heat from convection cooking can push the cavity temperature above the threshold that the microwave mode is rated to operate in safely. The temperature sensor and the heater assembly are the first components to inspect, as a faulty sensor may report false high readings, and a malfunctioning heater may not cycle off correctly, causing uncontrolled temperature buildup.

Diagnosing E-24 begins with checking the temperature sensor for proper resistance values and inspecting its wiring harness for damage or loose connections. The heater element should also be examined for signs of failure or short circuits. If the sensor reads out of specification or the heater does not cycle correctly, those components will need to be replaced. In some cases, simply allowing the oven to cool down completely before restarting will clear the condition, but recurring errors point to a faulty sensor or heater rather than normal use patterns.

Source: manufacturer service documentation.

Common causes of E-24

  1. 01

    Insufficient cool-down between Convection and Microwave modes

    Wiring / connection

    Running microwave mode immediately after high-temperature convection cooking traps residual heat in the cavity above safe microwave operating limits. Allow the oven to cool completely before switching modes.

  2. 02

    Faulty oven temperature sensor

    Part replacement

    A defective temperature sensor can report inaccurate high readings to the control board, triggering E-24 even when actual cavity temperatures are normal. Verify the sensor's resistance value matches specifications and inspect its wiring connections.

  3. 03

    Malfunctioning heater element

    Part replacement

    A heater that fails to cycle off properly can cause uncontrolled temperature buildup inside the oven cavity. Inspect the heater for signs of physical damage, scorching, or electrical shorts.

  4. 04

    Blocked or restricted oven ventilation

    Wiring / connection

    Obstructed air vents prevent heat from dissipating properly, causing the cavity to retain excess heat after convection use. Check that all vents are clear and the unit has adequate clearance around it.

  5. 05

    Damaged sensor wiring harness

    Part replacement

    Loose, pinched, or heat-damaged wiring between the temperature sensor and the control board can cause erratic or falsely elevated temperature readings. Visually inspect the harness for wear and verify all connectors are fully seated.

See the test procedure for each cause

Frequently asked questions about E-24

What does E-24 mean on a LG microwave?
E-24 on an LG microwave signals an over-temperature error, meaning the control board detected that the oven's internal cavity temperature exceeded its safe operating limit. This condition triggers an automatic shutdown to protect the appliance and prevent hazards. It is most commonly associated with using Convection mode and then switching to microwave mode before the oven has had time to cool down.
Can I fix E-24 on my LG microwave myself?
If the error is caused by residual heat from convection cooking, you can resolve it by unplugging the microwave, allowing it to cool completely for 30 to 60 minutes, and then restarting it. If the error returns during normal use, the temperature sensor or heater element likely needs to be tested and possibly replaced, which requires basic electrical diagnostic skills and a multimeter. Any work involving the heater or internal wiring should be performed with the unit fully unplugged.
Is it safe to use my LG microwave when it shows E-24?
No, you should not attempt to continue using the microwave while E-24 is active. The error indicates the cavity temperature has reached an unsafe level, and the appliance has shut down as a protective measure. Using the unit while this error is present or bypassing the shutdown could risk component damage or a fire hazard. Allow the oven to cool fully before attempting to restart it.
Will resetting my LG microwave clear the E-24 error?
Unplugging the microwave and allowing it to cool completely may clear E-24 if the error was caused by temporary overheating from back-to-back Convection and microwave use. However, if the root cause is a defective temperature sensor or a heater that is not cycling off correctly, the error will return after reset. A reset that does not hold is a strong indicator that a component needs testing or replacement.
How much does it cost to repair an LG microwave with an E-24 error?
Repair costs depend on the failed component and whether you hire a technician or perform the repair yourself. A replacement temperature sensor typically falls in the range of $15 to $50 for the part alone, while a heater element can range from $30 to $80 or more. If you hire a professional appliance technician, expect to add $75 to $150 or more in labor costs. For older units, it is worth comparing the repair cost against the price of a replacement appliance.

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