mypros+
Error code reference

LG Microwave Error Code E-32

Weight sensor short error (initial value of HEX is under 14 for 30 seconds while weight sensor in operation).

LG codesLG microwave codes

Weight sensor short error (initial value of HEX is under 14 for 30 seconds while weight sensor in operation).

First step from the service manual

Check sensor part and connection of sensor housing and PCB's connector.

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

MyPros+ Max

Get the full diagnostic procedure for E-32.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What E-32 means on a LG microwave

The E-32 error code on an LG microwave indicates a weight sensor short fault. Specifically, this error triggers when the initial hexadecimal value reported by the weight sensor falls below 14 (HEX) and remains at that level for 30 consecutive seconds during weight sensor operation. The weight sensor is used in automatic cooking modes to detect the mass of food placed on the turntable, allowing the microwave to adjust power levels and cook times accordingly. When the sensor signal drops this low and holds there, the control board interprets it as a short circuit condition in the sensor circuit.

The weight sensor assembly communicates with the main PCB through a dedicated connector and wiring harness. A short can occur at the sensor itself, within the connecting wiring, or at the point where the sensor housing connector interfaces with the PCB connector. Corrosion, pinched wiring, or a damaged sensor element can all drive the signal into this out-of-range condition. Because the threshold is defined as a sustained reading below HEX 14 for 30 seconds, intermittent faults may not trigger the code immediately, but a hard short will activate it quickly.

The first diagnostic step recommended is to inspect the sensor component itself and verify the integrity of the physical connection between the sensor housing connector and the PCB connector. A loose, corroded, or improperly seated connector can mimic a sensor short, so careful inspection of both the connector pins and the sensor element is essential before condemning the sensor outright.

Source: manufacturer service documentation.

Common causes of E-32

  1. 01

    Faulty or shorted weight sensor

    Part replacement

    The weight sensor element itself may have an internal short, causing its output signal to read below the minimum HEX 14 threshold. This is the most direct cause of E-32 and is confirmed when resistance or signal values at the sensor terminals are out of specification.

  2. 02

    Loose or disconnected sensor housing connector

    Wiring / connection

    If the connector between the sensor housing and the PCB is not fully seated, the signal can drop to an abnormally low level and trigger the short detection logic. Inspect the connector for proper engagement and any signs of backing out.

  3. 03

    Corroded or damaged connector pins

    Wiring / connection

    Corrosion or physical damage to the pins in the sensor housing connector or the PCB connector can cause high resistance or a direct short in the circuit. Look for discoloration, oxidation, or bent pins at both connector ends.

  4. 04

    Damaged wiring harness between sensor and PCB

    Part replacement

    The wiring running from the weight sensor to the PCB may be pinched, chafed, or broken, creating a short to ground or between conductors. Inspect the full length of the harness for visible damage or areas where it may contact a sharp chassis edge.

  5. 05

    Defective main PCB

    Part replacement

    If the sensor and all wiring and connectors test correctly, the PCB's sensor input circuit may have failed, causing it to misread or short-detect an otherwise normal signal. This is the least common cause and should be considered only after the sensor and wiring are ruled out.

See the test procedure for each cause

Frequently asked questions about E-32

What does E-32 mean on a LG microwave?
E-32 on an LG microwave indicates a weight sensor short error. The error activates when the sensor's output value stays below a HEX 14 threshold for 30 continuous seconds during operation. This tells the control board that the sensor circuit is producing an abnormally low signal consistent with a short condition. The problem typically involves the sensor itself, its connecting wiring, or the connector at the PCB.
Can I fix the E-32 error myself?
A knowledgeable DIYer can start by unplugging the microwave and inspecting the weight sensor connector to ensure it is fully seated and free of corrosion or damaged pins. If the connector looks intact, testing or replacing the weight sensor requires more technical ability and access to internal components. Microwave capacitors can hold a lethal charge even when unplugged, so internal work should only be done by someone who knows how to safely discharge the high-voltage capacitor first.
Is it safe to use my LG microwave while E-32 is displayed?
The E-32 fault disables the weight sensor, which means automatic weight-based cooking programs will not function correctly. Basic microwave functions may still operate depending on how the unit handles the fault, but relying on the microwave while an active sensor fault is present is not recommended. It is best to resolve the error before using the appliance for cooking.
Will resetting the microwave clear the E-32 error?
Unplugging the microwave for a few minutes and restoring power may temporarily clear the E-32 display, but the error will return if the underlying fault is still present. Because the code requires the sensor value to remain out of range for 30 seconds to trigger, a reset will not resolve a genuine sensor short or wiring problem. A permanent fix requires diagnosing and repairing the sensor circuit.
How much does it cost to repair an E-32 error on an LG microwave?
Repair costs vary depending on what component has failed. If only the connector needs reseating or cleaning, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing the weight sensor itself usually adds $30 to $80 in parts. If the main PCB needs replacement, total costs including parts and labor can range from $150 to $350 or more, at which point comparing the repair cost to the value of the microwave is worthwhile.

Related LG microwave codes

All LG microwave codes
View all 84 LG microwave codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass