mypros+
Error code reference

LG Air Conditioner Error Code E135

Electronic Expansion Valve opening malfunction (2nd stage)

LG codesLG air conditioner codes
Avg. service call
$285
National average. Trip fee plus diagnostic plus labor. Before parts.
MyPros+ 3-day pass
$9.95
Same diagnostic steps, on your phone. Start now.
You keep in your pocket
~$275
Even before you buy the part.
Skip the service call. Fix it yourself.
Full procedure unlocks instantly.
Get Started

What the E135 error code actually means

Your LG air conditioner has detected that a valve controlling refrigerant flow is not shutting properly when it should, allowing refrigerant to leak into a part of the system that is supposed to be off. This can cause the system to lose efficiency, produce uneven cooling, or potentially damage components over time. A technician will need to check the wiring and physical connections on this valve to determine the exact cause.

Diagnostic procedure

The full E135 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check if EEV wire is connected to PCB; check if EEV coil is connected to main body properly.
Unlock with pass
Unlock with pass
Unlock with pass
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock E135 procedure $9.95

Or subscribe: $29/month for unlimited access to all codes plus Max AI diagnostics.

Most common causes of E135

Ranked by how often they cause this code
  1. 1Disconnected EEV wiring at the PCB
  2. 2EEV coil improperly seated on valve body
  3. 3Failed or burned EEV coil
  4. 4Stuck or mechanically failed EEV valve body
  5. 5PCB control circuit fault

Most DIYers save hundreds by diagnosing before ordering parts.

Get Started

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

Questions people ask about E135

What does E135 mean on a LG air_conditioner?
E135 on an LG air conditioner indicates an Electronic Expansion Valve opening malfunction at the second stage, where refrigerant is leaking into an indoor unit that has been commanded to stop. The EEV is the component responsible for controlling refrigerant flow into the indoor unit, and when it fails to close, refrigerant continues migrating into the idle section of the system. This can lead to pressure imbalances, reduced efficiency, and potential damage if left unaddressed.
Is it safe to run my LG air conditioner while E135 is displayed?
Continuing to operate the system with an E135 fault is not recommended. A stuck-open EEV allows refrigerant to flood into a stopped indoor unit, which can cause liquid refrigerant to return to the compressor and lead to compressor damage over time. It is best to shut the system off and have it inspected before resuming normal operation.
Will resetting my LG air conditioner clear the E135 error?
A power reset may temporarily clear the fault code, but if the underlying issue with the EEV connection, coil seating, or valve itself has not been corrected, the E135 error will return once the system attempts to close the valve again. A reset should only be used after the wiring and mechanical connections have been inspected and corrected, not as a substitute for diagnosis.
Can I fix E135 myself or do I need a technician?
Some steps, such as checking that the EEV wiring harness is fully plugged into the PCB and verifying the EEV coil is properly seated on the valve body, can be performed by a knowledgeable DIYer who is comfortable working inside the unit. However, if the fault points to a failed coil or valve body, or a PCB issue, those repairs typically require a qualified technician. Any work involving the refrigerant circuit itself requires EPA 608 certification.
How much does it cost to repair an E135 error on an LG air conditioner?
Repair costs depend on what component has failed. If the issue is simply a loose wire or a reseated coil, diagnostic labor costs may range from $75 to $150. If an EEV coil or valve body replacement is needed, parts plus labor can range from $150 to $500 or more depending on the model and local labor rates. PCB replacement, if required, can push costs higher.

Related LG air conditioner error codes

All LG air conditioner codes

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

Get Started

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