How to Fix LG Air Conditioner Error E2

What error E2 means

Error E2 on an LG air conditioner indicates a problem with a sensor. LG's troubleshooting article for this group of codes says that if the AC displays CH01, CH02, CH06, CH12, CH41 to CH48, E1, E2, E3, E7, E8, F2 or F3, it indicates a sensor-related problem, which may be caused by a faulty temperature or pipe sensor, a loose or disconnected sensor, a main circuit board error, or a temporary electrical issue. LG's owner's manual for its portable air conditioner (model LP0814WNR) is more specific for that product: E2 means a short or open circuit in the indoor pipe thermistor, and the instruction is to unplug the air conditioner and contact your authorized LG service center. In the same manual E1 is the indoor air thermistor, so E2 is the sensor that measures the temperature of the indoor coil rather than the room air. When a sensor reads open or short, the control board cannot regulate cooling safely and stops the unit. LG's remedy is a power reset; if the code returns, stop using the product and request service.

Why error E2 happens on a LG Air Conditioner

On a LG Air Conditioner, error E2typically resolves to one of three root-cause categories. They’re ordered cheapest-to-verify first — start at the top and only escalate if the first cause is ruled out.

• Mechanical: blockage, obstruction, or worn moving part. A common cause across LG Air Conditioners in India — air filters clog and fan bearings and drain lines collect dust and sludge. Our step-by-step fix below targets this category first because it’s the cheapest to verify and resolvereports.
• Electrical: voltage spike, sensor fault, or PCB anomaly. India’s grid carries more voltage fluctuation than many appliance design tolerances assume, and a routine surge or sag can be enough to throw E2. If you’ve had recent voltage events (lights flickering, AC tripping), start your investigation here. A working stabilizer prevents this entire category.
• Software / configuration: stuck child-lock, demo-mode, or pending firmware reset.Less common but the cheapest fix when it applies — a 60-second factory reset clears it. We list this last because it’s rarely the actual cause, but check it before disassembling anything.

Safety first

Step-by-step fix

1. 1

   Step 1

   Read the code carefully

   Confirm the display shows E2 and not F2, and note whether the AC has stopped cooling. LG's F1 to F3 display on some models is only a fan-speed indicator shown for a few seconds after you press the fan button, while E2 is a fault that stops the unit. A blinking indoor light along with E2 confirms you are looking at a fault code.

   Pro tip: Note the model number from the label on the side or the front panel of the indoor unit; LG's advice is the same for all models, but the technician will need it.

2. 2

   Step 2

   Reset the power

   Unplug your air conditioner. If you cannot access the power plug, turn off the circuit breaker. Wait about five minutes. Plug the air conditioner back in or turn on the circuit breaker and check whether the error code has cleared. This is LG's prescribed reset for the sensor group of codes, and it clears the temporary electrical issues LG lists as one possible cause.

   Caution: Do the reset once. If E2 comes back, repeated restarts will not repair a sensor.

3. 3

   Step 3

   Check for an obvious airflow problem on the indoor coil

   A pipe or coil sensor reports the temperature of the indoor coil. If the filters are choked with dust or the louvres are blocked, the coil can run far colder than normal, and that is worth fixing in any case. With the power off, slide out the mesh filters, wash and dry them, and refit. This does not repair a faulty sensor, but it removes one reason for an abnormal coil reading.

   Pro tip: LG's general advice for any error code is to clean the filters and do a power reset before calling service.

4. 4

   Step 4

   Run the AC and watch for a repeat

   Start the AC in Cool mode and run it for an hour. If E2 does not return and the unit cools normally, the trip was temporary and you can carry on using it. LG says you can continue using your air conditioner if it operates normally after the reset, but a repeated error may indicate an internal circuit or wiring problem.

   Pro tip: Note the time between restart and the code returning; a code that comes back within minutes points to the sensor or its connector, one that takes hours points to a marginal reading.

5. 5

   Step 5

   Stop using the AC if E2 returns

   If the same error code appears again after resetting, LG's instruction is to stop using the product and request service to prevent further damage. The sensor, its connector or the main board needs a technician. For the LG portable AC, the manual's instruction for E2 is simply to unplug the air conditioner and contact your authorized LG service center.

   Caution: LG warns not to disassemble the air conditioner or replace internal parts yourself; doing so may cause fire, electric shock, serious injury or death.

6. 6

   Step 6

   Request LG service

   Call LG customer care with the model number and the code E2, and say whether the AC stops cooling when the code appears. A thermistor is an inexpensive part and a quick replacement for a technician; the diagnosis is checking the sensor's resistance and its connector on the board. If the unit is under warranty, use LG authorised service only.

   Pro tip: Ask the technician to confirm whether the fault was the sensor, its connector or the board, so you know what was replaced.

Fixed it? Protect it next time. See an extended warranty plan for your Air Conditioner →

Common mistakes LG Air Conditioner owners make with error E2

These six anti-patterns turn a routine 30-minute fix into a costly repair or warranty void. Read before starting.

• Forcing a stuck door, lid, or panel. Prising open a LG Air Conditioner housing while it is in a fault state. Forcing it usually breaks the latch or sensor — turning a small part replacement into a full service call. If the door won’t open, run the safety-disconnect step first, then try again.
• Repeated unplug-and-replug as a “reset” ritual. Cycling power three or four times without diagnosing the underlying cause stresses the PCB and can convert a soft fault into a permanent firmware-corruption code. Reset once, observe whether the error returns immediately, then move to actual diagnosis if it does.
• Pouring water (or any liquid) into electronics-adjacent areas to flush a blockage.Even a small amount near the PCB or main wiring harness can cause permanent damage that voids warranty. The unit’s drainage paths exist for a reason; if a blockage isn’t cleared by the manual procedure, it isn’t getting cleared by improvisation either.
• Skipping the safety-disconnect step.“I’ll just check quickly” is the most expensive sentence in appliance repair. Working live on a 230V circuit (especially with a hot or wet appliance) carries real shock risk and instantly voids any warranty claim. Disconnect, wait two minutes for capacitor drain, then proceed.
• Buying counterfeit replacement parts on Amazon.in. Red flags: price below 60% of LG authorised price, generic packaging without a model-compatibility list, seller name that doesn’t match a known LG parts distributor, listings dated within the last 30 days with no reviews. Counterfeit parts often work for 2-3 weeks then fail with a different error, costing you double.
• Calling an “independent” technician for a warranty-covered unit. Indian appliances under LG warranty must be serviced by authorised technicians or the warranty voids permanently. Even if the warranty is expired, third-party local technicians often replace working parts to inflate the bill — verify each part swap by asking to see the failure on the old part before they install the new one.

Preventing future E2 on your LG Air Conditioner

The fix above resolves the current instance. These five maintenance habits prevent it from coming back, specific to LG Air Conditioners in Indian operating conditions (hard water, voltage variability, monsoon humidity).

• Monthly: wash the air filters and clear the drain line. Hard-water deposits and everyday debris are a frequent cause of recurring E2 in India, and a few minutes each month is the cheapest way to avoid a repeat.
• Quarterly: descale water-touching components. Use food-grade citric acid or a LG approved descaler for hard-water regions (Bangalore, Hyderabad, large parts of Maharashtra and Tamil Nadu). Skipping this in a hard-water zone shortens the life of the heating and water-touching parts.
• Run the unit through a working stabilizer. A mainline stabilizer sized for Air Conditioners is the cheapest protection against voltage-induced E2 occurrences. The MCB on your distribution board is not a substitute — it trips on overload, not on under-voltage or surge.
• Decide AMC vs DIY honestly. Compare the LGAMC quote against what you have actually spent on service. If your unit is >5 years old and you’ve had two service calls in the last 18 months, an AMC usually pays for itself. Younger units with no service history: DIY plus stabilizer is cheaper.
• Watch monthly for early-warning signs. Unusual noise during a specific cycle phase, water spotting, mild burning smell — any of these means a service call within a week, not a wait-and-see month. Catching E2-precursor symptoms early turns a major repair into a routine maintenance visit.

If error E2 returns within 30 days of completing the fix above, escalate directly to LGauthorised service — repeat patterns within a month indicate a deeper fault (worn bearing, failing PCB, leak that wasn’t fully identified) that surface-level repair won’t resolve. Document the dates and circumstances of each occurrence; the service centre will use this to prioritize root-cause investigation.