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Error code reference

LG Hvac Error Code E153

EEPROM error (EEPROM error count >= 5 failures during read/write test).

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EEPROM error (EEPROM error count >= 5 failures during read/write test).

First step from the service manual

PCB check or replacement.

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

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What E153 means on a LG hvac

E153 is an EEPROM (Electrically Erasable Programmable Read-Only Memory) error that triggers when the PCB's onboard memory chip fails a read/write self-test five or more consecutive times. The EEPROM stores critical system configuration data including refrigerant settings, capacity parameters, operating modes, and calibration values. When the control board cannot reliably read from or write to this memory, the unit cannot operate safely with accurate parameters, so the fault code is thrown to halt normal operation.

The most common root cause is a failed or corrupted EEPROM chip on the main PCB. This can result from voltage spikes, power surges, or age-related degradation of the memory cell. In some cases, the solder connections between the EEPROM chip and the PCB may develop cracks or cold joints that intermittently break continuity during read/write cycles. Moisture or condensation intrusion onto the PCB can also corrode traces or chip contacts, producing unreliable memory operations.

Because the EEPROM is soldered directly onto the main control board, it is not a separately serviceable component in most field repair scenarios. The standard diagnostic approach is to inspect the PCB for visible damage such as burn marks, corrosion, or cracked solder joints, and then replace the PCB if no correctable fault is found. A replacement board will come pre-programmed or will require configuration to match the specific unit's parameters.

Source: manufacturer service documentation.

Common causes of E153

  1. 01

    Failed EEPROM chip on PCB

    Part replacement

    The EEPROM memory chip itself has degraded or failed, causing repeated read/write errors during self-testing. This is the most likely cause and typically requires full PCB replacement since the chip is not field-replaceable.

  2. 02

    Power surge or voltage spike damage

    Part replacement

    A voltage surge can corrupt EEPROM data or permanently damage the memory cell, triggering the error threshold. Check the unit's power supply history and inspect the PCB for burn marks or discoloration near the memory area.

  3. 03

    Cold solder joints or cracked PCB traces

    Wiring / connection

    Micro-cracks in solder joints connecting the EEPROM chip to the board can cause intermittent communication failures that accumulate to five or more errors. Inspect the board under magnification for cracked or dull solder joints.

  4. 04

    Moisture or corrosion on the control board

    Part replacement

    Condensation or water intrusion can corrode EEPROM contacts or nearby PCB traces, disrupting reliable memory communication. Look for white or green corrosion residue on the board surface near the memory chip.

  5. 05

    General PCB failure

    Part replacement

    Broader control board failure beyond the EEPROM chip alone can produce this error, particularly in older units. If no specific damage is visible, the PCB should be replaced as a complete assembly.

See the test procedure for each cause

Frequently asked questions about E153

What does E153 mean on a LG hvac?
E153 indicates an EEPROM error on the main control board, specifically that the memory chip has failed a read/write test five or more times. The EEPROM stores the operating parameters and configuration data the system needs to function correctly. When this threshold is reached, the unit stops normal operation to prevent running with corrupted or unreadable settings. A PCB inspection or replacement is the first recommended diagnostic step.
Can I fix E153 myself, or do I need a technician?
In most cases, resolving E153 requires a technician because it involves inspecting or replacing the main control board. A knowledgeable DIYer can visually inspect the PCB for obvious damage such as burn marks, corrosion, or cracked solder joints, but the EEPROM chip itself is soldered to the board and is not independently serviceable in the field. Replacement of the control board typically requires proper handling and, depending on the unit, may require system parameter configuration after installation.
Will resetting the unit clear the E153 error?
A power reset may temporarily clear the error display, but if the underlying EEPROM chip or PCB is faulty, the error will return once the unit performs its read/write self-test again and accumulates five failures. Because the fault threshold requires five failures to trigger, a reset alone is not a reliable fix and the root cause should be diagnosed before returning the unit to service.
Is it safe to run my LG HVAC system while E153 is active?
It is not recommended to continue operating the unit while E153 is active. The error indicates the control board cannot reliably access the memory that stores critical operating parameters, which means the system may not regulate itself correctly. Continuing to run the unit under these conditions could lead to improper operation or potential damage to other components.
How much does it cost to repair an E153 error on an LG HVAC?
Repair costs for E153 typically depend on whether the PCB needs to be replaced. Control board replacement for LG HVAC systems generally ranges from $200 to $600 or more depending on the unit model, part availability, and local labor rates. Diagnostic fees are often charged separately and may range from $75 to $150. Getting a quote from a certified HVAC technician before proceeding is advisable.

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