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Error code reference

LG Microwave Error Code E-62

Humidity sensor short error.

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Humidity sensor short error.

First step from the service manual

Check if both terminals of the sensor are slightly shorted.

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
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What E-62 means on a LG microwave

The E-62 error code on an LG microwave indicates a humidity sensor short error. The humidity sensor, sometimes called a moisture sensor, is responsible for detecting steam released from food during cooking. The microwave's control board reads the sensor's output to automatically adjust cooking time and power levels. When the control board detects that both terminals of the humidity sensor are shorted together, it triggers the E-62 fault and halts normal operation to prevent inaccurate cooking cycles or potential component damage.

A short across the sensor terminals means the resistance between those two points has dropped to near zero, which produces a signal outside the expected operating range. Under normal conditions, the sensor presents a measurable resistance that changes in response to humidity levels inside the cavity. A shorted condition eliminates that variable response entirely, making the sensor useless for auto-cook functions and causing the board to flag the fault.

Common causes include physical damage to the sensor itself, moisture or food debris bridging the sensor terminals, deteriorated wiring insulation causing conductors to contact each other, or a failed connector at the sensor harness. The first diagnostic step is to check both sensor terminals directly to confirm the short condition, which helps distinguish a faulty sensor from a wiring harness problem before replacing components.

Source: manufacturer service documentation.

Common causes of E-62

  1. 01

    Failed humidity sensor

    Part replacement

    The sensor itself has developed an internal short between its terminals. Confirm by measuring resistance directly across the sensor terminals; a reading near zero ohms indicates the sensor has failed and needs replacement.

  2. 02

    Food debris or moisture bridging sensor terminals

    Wiring / connection

    Grease, food splatter, or condensed moisture on the sensor terminals can create a conductive path that mimics a short. Inspect the sensor surface and surrounding area for visible contamination and clean thoroughly before further testing.

  3. 03

    Damaged wiring harness

    Part replacement

    The insulation on the wires connecting the humidity sensor to the control board may have worn through or melted, allowing conductors to contact each other. Trace the full length of the sensor harness and check for pinched, burned, or abraded sections.

  4. 04

    Corroded or shorted connector

    Wiring / connection

    The connector at the sensor or at the control board may have corroded pins or bent terminals that are bridging two contacts. Disconnect the connector and inspect each pin for corrosion, deformation, or moisture intrusion.

  5. 05

    Faulty control board

    Part replacement

    If the sensor and wiring harness both test within normal parameters, the control board itself may be misreading or generating a false short signal. This is the least likely cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about E-62

What does E-62 mean on a LG microwave?
E-62 is a humidity sensor short error on LG microwaves. The control board has detected that both terminals of the humidity sensor are shorted together, producing a signal outside the normal operating range. This disables sensor-based cooking functions and requires inspection of the sensor, its wiring, and connectors before the microwave will operate normally again.
Can I fix the E-62 error on my LG microwave myself?
Some causes of E-62 are DIY-friendly, such as cleaning contamination off the sensor terminals or inspecting the wiring harness for visible damage. However, microwaves contain high-voltage capacitors that can retain a dangerous charge even when unplugged, so internal repairs should only be attempted by technicians who know how to safely discharge the capacitor. Replacing the humidity sensor itself is a moderate-difficulty repair once the capacitor is safely discharged.
Is it safe to use my LG microwave while it shows E-62?
Using the microwave with an active E-62 error is not recommended. The humidity sensor short means sensor-driven auto-cook programs cannot accurately determine when food is done, which could result in undercooked or overcooked food. Manual timed cooking may still function in some cases, but it is best to resolve the fault before relying on the appliance.
Will resetting my LG microwave clear the E-62 error?
A simple power reset by unplugging the unit and restoring power may temporarily clear the error code, but the code will return if the underlying short condition still exists. Resetting does not repair a faulty sensor, damaged wiring, or contaminated terminals. The root cause must be diagnosed and corrected for the error to stay cleared.
How much does it cost to repair an E-62 error on a LG microwave?
Repair costs vary depending on the cause. A humidity sensor replacement part typically costs in the range of $15 to $50 depending on the model. If professional labor is involved, total repair costs including parts and service can range from $80 to $200 or more. If the control board is at fault, costs will be higher, and in some cases it may be more economical to replace an older microwave.

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