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Error code reference

LG Hvac Error Code E562

Exhaust air (EA) fan motor error

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Exhaust air (EA) fan motor error — motor RPM is lower than 120 RPM for about 40 seconds.

First step from the service manual

Check if motor connector (CN73) is dislocated from PCB; if so, reconnect it.

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

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What E562 means on a LG hvac

The E562 error code on an LG HVAC unit indicates a fault with the exhaust air (EA) fan motor. Specifically, the system's control board has detected that the motor's rotational speed has dropped below 120 RPM and remained there for approximately 40 seconds. Under normal operation, the EA fan motor circulates exhaust air through the unit at a speed the PCB continuously monitors. When the motor fails to reach or maintain its minimum required RPM threshold, the board triggers this fault to prevent the unit from operating in a compromised state.

The most common starting point for diagnosing E562 is inspecting the motor connector labeled CN73 on the PCB. A loose or fully dislocated connector will cut off the control signal or power to the motor, causing it to spin slowly or not at all. Beyond connector issues, the fault can also result from a motor that is mechanically binding due to debris obstruction, worn bearings, or a failed motor winding. In some cases, the problem originates at the control board itself, where a damaged motor drive circuit fails to deliver adequate voltage or control signal to the motor.

Diagnostic steps should proceed from the simplest and most accessible checks first. After confirming CN73 is fully seated, inspect the fan blades for obstructions and attempt to spin the motor manually to check for binding. If the motor turns freely and the connector is secure, measuring the voltage output from the PCB to the motor connector will help determine whether the fault lies with the board or the motor itself.

Source: manufacturer service documentation.

Common causes of E562

  1. 01

    Loose or disconnected motor connector (CN73)

    Wiring / connection

    If the CN73 connector has come loose from or fully separated from the PCB, the motor will lose its control signal or power supply and fail to spin at the required RPM. Visually inspect the connector and firmly reseat it if it appears dislodged.

  2. 02

    Obstructed or blocked fan blades

    Wiring / connection

    Debris such as dust buildup, ice accumulation, or a foreign object can physically prevent the fan blades from rotating at normal speed. Inspect the fan assembly visually and attempt to rotate the blades by hand to check for resistance.

  3. 03

    Worn or failed EA fan motor bearings

    Part replacement

    Over time, the motor bearings can wear out, increasing friction and causing the motor to slow below the 120 RPM threshold. A grinding noise during operation or stiffness when rotating the shaft manually are indicators of bearing failure.

  4. 04

    Failed EA fan motor windings

    Part replacement

    An internal winding failure within the motor can prevent it from generating sufficient torque to reach and maintain minimum RPM. This type of failure typically requires motor replacement and can be confirmed by measuring motor resistance.

  5. 05

    Faulty PCB motor drive circuit

    Part replacement

    If the control board's motor drive circuitry is damaged, it may not deliver the correct voltage or control signal to the EA fan motor. This is typically diagnosed after ruling out connector and motor faults by measuring output voltage at CN73.

See the test procedure for each cause

Frequently asked questions about E562

What does E562 mean on a LG hvac?
E562 indicates that the exhaust air (EA) fan motor has been detected running below 120 RPM for approximately 40 seconds. This is a motor speed fault that causes the system to shut down to prevent improper operation. The issue can stem from a loose wiring connector, a blocked fan, a worn motor, or a faulty control board.
Can I fix the E562 error myself?
Some causes of E562 are accessible to a knowledgeable DIYer. The first recommended step is to check whether the motor connector CN73 has come loose from the PCB and reseat it if necessary. Clearing debris from the fan blades is also something a careful homeowner can attempt. However, diagnosing motor winding failures or PCB faults requires electrical testing and should be handled by a qualified technician.
Will resetting the unit clear the E562 error code?
A power reset may temporarily clear the E562 code, but if the underlying cause is not corrected, the fault will return once the system detects the motor is again running below 120 RPM for 40 seconds. Resetting without addressing the root cause is not a reliable fix and could delay proper diagnosis.
Is it safe to continue running my LG HVAC with an E562 error?
The system is designed to stop normal operation when E562 is triggered, specifically to prevent running with a malfunctioning exhaust fan. Continuing to force operation without resolving the fault could result in inadequate airflow, overheating of internal components, or further damage to the motor or control board. The unit should be serviced before returning to regular use.
How much does it cost to repair an E562 error on an LG HVAC?
Repair costs vary depending on the root cause. If the fix is simply reseating the CN73 connector, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing the EA fan motor can range from $150 to $400 or more depending on the specific unit and labor rates. A PCB replacement is generally the most expensive repair, often ranging from $300 to $600 or higher.

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