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Error code reference

LG Microwave Error Code E-14

Gas sensor dry up / no load error

LG codesLG microwave codes

Gas sensor dry up / no load error - oven operated without food or with completely dried food.

First step from the service manual

Insert food and restart.

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

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What E-14 means on a LG microwave

The E-14 error code on an LG microwave indicates a gas sensor dry-up or no-load condition. LG microwaves equipped with a humidity or gas sensor use that sensor to detect moisture and gases released from food as it heats. When the oven is operated without any food inside, or with food that has been so thoroughly dried that it releases no detectable moisture or gas, the sensor cannot register a normal load signature. The control board interprets this absence of a sensor signal as an abnormal condition and triggers the E-14 fault to halt operation and protect the cavity and components.

The gas sensor itself is a small component, typically mounted inside the microwave cavity or near the ventilation path, that monitors volatile compounds and humidity during cooking cycles. Under normal cooking conditions, food releases steam and gases that the sensor detects continuously. A completely dried food item, such as an over-dehydrated product or a very small amount of food with negligible moisture content, can produce the same no-signal result as an empty cavity, triggering the same E-14 response.

The first and most important diagnostic step is to confirm that food with adequate moisture content is present in the cavity before restarting the unit. If the error persists even with normal food loads, the gas sensor itself may have degraded or failed, requiring component-level inspection and possible replacement. Wiring connections to the sensor should also be checked for looseness or corrosion before concluding the sensor has failed.

Source: manufacturer service documentation.

Common causes of E-14

  1. 01

    Microwave operated empty

    Wiring / connection

    Running the microwave with nothing inside is the most common trigger for E-14. Without any food to absorb energy and release moisture, the gas sensor detects no load and the control board faults out.

  2. 02

    Extremely dry or low-moisture food

    Wiring / connection

    Foods that are heavily dehydrated, very small in quantity, or have negligible moisture content may not release enough humidity or gas for the sensor to register a valid cooking load, producing the same result as an empty cavity.

  3. 03

    Failed or degraded gas sensor

    Part replacement

    If E-14 appears consistently even when cooking normal food items, the gas sensor itself may have failed or lost sensitivity over time. This requires inspection and likely replacement of the sensor component.

  4. 04

    Loose or corroded sensor wiring connection

    Wiring / connection

    A disconnected or corroded wire harness connector at the gas sensor can interrupt the signal to the control board, causing it to read a no-load condition even when food is present. Inspect the connector and wiring for damage or looseness.

  5. 05

    Control board fault

    Part replacement

    In rare cases, the control board may misinterpret sensor data or develop a fault that triggers E-14 erroneously. This is typically diagnosed only after the sensor and wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about E-14

What does E-14 mean on a LG microwave?
E-14 on an LG microwave indicates a gas sensor dry-up or no-load error. It means the microwave's internal gas or humidity sensor did not detect any moisture or gases during operation, which happens when the cavity is empty or the food inside is too dry. The microwave halts operation and displays the code as a protective measure. Placing food with adequate moisture inside and restarting the unit is the recommended first step.
How do I fix the E-14 error on my LG microwave?
Start by placing a food item with normal moisture content in the cavity and restarting the microwave. If the error clears, no further action is needed. If E-14 returns even with typical food loads, inspect the gas sensor wiring for loose or corroded connections, and consider testing or replacing the gas sensor itself if the wiring checks out.
Is it safe to use my LG microwave after an E-14 error?
Yes, it is generally safe to resume use after correcting the root cause, which is usually operating the unit without food. The E-14 code is a protective fault designed to prevent the microwave from running under a no-load condition, which can stress internal components. Once food is placed inside and the error is cleared, normal operation can continue.
Will resetting my LG microwave clear the E-14 error?
A reset alone may temporarily clear the display, but the error will return if the underlying condition is not resolved. The correct approach is to insert food with sufficient moisture content before restarting. If a sensor or wiring fault is causing E-14, a simple reset will not provide a lasting fix and component-level diagnosis will be needed.
How much does it cost to repair an E-14 error on an LG microwave?
If the cause is simply an empty cavity, there is no repair cost at all. If the gas sensor has failed and needs replacement, parts and labor costs can range from roughly 80 dollars to 200 dollars or more depending on the specific model and labor rates in your area. Checking wiring connections first is a no-cost diagnostic step that should be completed before purchasing any parts.

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