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Error code reference

LG Heat Pump Error Code E462

Outdoor unit EEV open 2 self diagnosis error.

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What the E462 error code actually means

Your LG heat pump has detected a problem with a refrigerant flow control valve in the outdoor unit, specifically that a valve called EEV 2 is not closing properly when it should. This valve manages how much refrigerant moves through the system, and when it stays open incorrectly, the heat pump cannot operate efficiently or safely. A qualified technician will need to inspect the valve, its wiring, and the control board to diagnose and fix the issue.

Diagnostic procedure

The full E462 procedure

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of E462

Ranked by how often they cause this code
  1. 1Failed EEV stepper motor
  2. 2Wiring harness fault
  3. 3Mechanically stuck valve body
  4. 4Outdoor unit control board failure
  5. 5Refrigerant system contamination

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Questions people ask about E462

What does E462 mean on a LG heat_pump?
E462 on an LG heat pump indicates an outdoor unit Electronic Expansion Valve open self-diagnosis error on valve circuit 2. The system's startup or runtime diagnostic routine detected that EEV 2 is not closing to its commanded position. This fault is designed to protect the refrigerant system and compressor from operating with an uncontrolled refrigerant flow condition.
Is it safe to keep running my LG heat pump with an E462 error?
Operating the heat pump with an active E462 fault is not recommended. A stuck-open EEV 2 can cause improper refrigerant distribution, leading to compressor flooding or overheating over time. The system may shut itself down automatically as a protective measure. You should disable the unit and contact a qualified technician promptly.
Will resetting my LG heat pump clear the E462 error?
A power reset may temporarily clear the E462 fault code, but if the underlying hardware problem with EEV 2 persists, the error will return when the system runs its self-diagnosis routine again. Resetting without diagnosing and repairing the root cause does not fix the problem. Persistent return of E462 after a reset confirms that a component inspection is needed.
Can I fix E462 on my LG heat pump myself?
This error involves components inside the outdoor refrigerant circuit, including the EEV stepper motor, wiring harness, and potentially the control board. Basic wiring inspections are accessible to experienced DIYers, but any work involving refrigerant handling or sealed system components requires an EPA Section 608 certified technician. Attempting to open the refrigerant circuit without certification is illegal and dangerous.
How much does it cost to repair an E462 error on an LG heat pump?
Repair costs vary depending on the specific failed component. Wiring harness repairs or connector cleaning are generally lower cost, typically in the range of $100 to $250 including labor. Replacing the EEV 2 valve assembly or the outdoor control board can range from $300 to $700 or more depending on parts availability and labor rates in your area.

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