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Error code reference

LG Air Conditioner Error Code E152

Error due to closed EEV of indoor unit (2nd detection)

LG codesLG air conditioner codes
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What the E152 error code actually means

Your LG air conditioner has detected that a small motorized valve inside the indoor unit, which controls how refrigerant flows through the system, is stuck closed and will not open. The system tried to correct this once already and failed, so it shut down to avoid further damage. A technician will need to inspect the valve, its wiring, and the control board to find and fix the problem.

Diagnostic procedure

The full E152 procedure

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1
First diagnostic step
Check EEV wire connection to PCB; check coil connection to main body; measure coil terminal resistance.
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Most common causes of E152

Ranked by how often they cause this code
  1. 1Loose or disconnected EEV wiring harness
  2. 2Failed EEV coil (open or shorted winding)
  3. 3Poor coil-to-valve body connection
  4. 4Mechanically seized EEV valve body
  5. 5PCB output failure

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Questions people ask about E152

What does E152 mean on a LG air_conditioner?
E152 indicates that the indoor unit's Electronic Expansion Valve (EEV) has been detected as stuck closed on a second consecutive check by the control board. The valve controls refrigerant flow into the indoor coil, and if it cannot open, the system cannot operate safely. The control board shuts down operation to prevent compressor and refrigerant circuit damage.
Will resetting the air conditioner clear the E152 error?
A power reset may temporarily clear the fault display, but because E152 is a second-detection fault, the control board has already attempted one recovery cycle automatically. If the underlying problem with the EEV coil, wiring, or valve body is not corrected, the error will return quickly once the system attempts to operate again.
How much does it typically cost to repair an E152 error on an LG air conditioner?
Repair cost depends on the root cause. If the fix is simply reseating a connector or repositioning the coil, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the EEV coil or valve body needs replacement, parts and labor combined can range from $200 to $600 or more depending on the unit model and local labor rates.
Can I fix E152 myself, or do I need a technician?
Some basic checks, like reseating the EEV wiring connector or confirming the coil is fully seated on the valve body, are accessible to a knowledgeable DIYer. However, measuring coil terminal resistance accurately, diagnosing PCB output signals, and replacing the EEV or coil require tools and refrigerant handling knowledge that typically call for a licensed HVAC technician.
Is it safe to keep running my LG air conditioner with an E152 error?
No. When E152 is active, the system has shut itself down specifically to prevent damage from operating with a closed expansion valve. Running the system in this condition can cause refrigerant circuit pressure imbalances and potential compressor damage. The unit should remain off until the fault is diagnosed and repaired.

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