LG Portable Air Conditioner Troubleshooting (9 Issues Solved!) (2023)

The flexibility of an LG portable air conditioner is incomparable, as you can move with your AC without worrying about the unforgiving heat or cold. But before anything, it’s worth knowing basic LG portable air conditioner troubleshooting just in case your unit malfunctions.

This guide will help you troubleshoot your portable LG air conditioner when it won’t turn on or off, blow cold or warm air, or drain or evaporate water. You can also fix it when its remote or compressor won’t work or when the latter keeps shutting off.

Moreover, the guide will enable you to troubleshootthe various error codes that might pop up on your LG unit. So, I’ll discuss all those issues, indicating what you can do to fix your portable air conditioner DIY.

Hopefully, you’ll manage it without calling experts and save time and money. Let’s jump into the troubleshooting guide for your LG portable air conditioner!

LG Portable Air Conditioner Troubleshooting (9 Issues Solved!) (1)

In a rush? Find below nine portable LG air conditioner issues and their fixes.

(Video) How to Fix a Portable Air Conditioner that doesn't blow cold air the EASY WAY!

Quick LG Portable Air Conditioner Troubleshooting Guide

ProblemLikely CauseRecommended Fix
1.LG Portable AC Won’t Turn OnPower outage, bad outlet, tripped breaker, loose or faulty power plug, or bad AC unitReplace a bad outlet, reset a tripped breaker and properly plug in a loose power plug. Replace the power plug if it’s faulty and the AC if none of the fixes work.
2.LG Portable AC Won’t Turn OffDirty condenser coils, or a defective thermostat, thermistor, temp control board, or relay boardClean the condenser coils if they are dirty and replace a defective thermostat, thermistor, temperature control board, or relay board
3.LG Portable AC Won’t Blow Cold AirWrong temperature setting, leaky vent, windows, doors, or walls, lack of clearance, or dirty filter, vent, or condenser coils. Unstable room temperature, frozen coils, low-speed fan, direct sunlight, low refrigerant, or bad compressor or exhaust fanSet the AC on Cool Mode, replace a leaky vent, and seal any sources of leaks on the windows, doors, and walls. Create a 20-inch + clearance around the AC and clean a dirty filter, vent, or coils. Thaw out frozen coils, raise the Ac temperature if the room’s temperature is unstable, and increase the fan speed. Avoid direct sunlight and call an expert to check the refrigerant, the compressor, and the exhaust fan
4.LG Portable AC Won’t Blow Hot AirFaulty fan motor or burnt circuit boardReplace the fan motor if it’s faulty or the circuit board if it’s burnt (an expert can help you check it)
5.LG Portable AC Won’t DrainDisconnected or blocked drain line, dirty coils, bad condensate pumpFix the drain line if disconnected, and unclog it if it’s blocked. Clean dirty condenser coils and replace a faulty condensate pump
6.LG Portable AC Won’t Evaporate WaterHigh humidity, dirty filter, poor drainage, or bad condensate pumpTry lowering the humidity with a dehumidifier, clean the dirty filter, unclog the drain, and replace a faulty condensate pump
7.The Remote Won’t WorkDead batteries, long-range, dense barriers, or faulty remote or main control boardReplace the batteries (if you’ve been using them for one year) and avoid dense barriers (or walls). Replace the remote or main control board if faulty
8.The Compressor Won’t WorkA faulty temperature control board, thermostat, overload, thermistor, capacitor, main control, or compressorReplace any of those components if they are faulty
9.The Compressor Keeps Shutting OffOverheating, dirty condenser coils, low refrigerant, or shorted compressorShut down the AC to cool off the compressor, clean dirty coils, replace a shorted compressor, and call an expert to check the refrigerant

So, How Do I Fix My LG Portable Air Conditioner?

Generally, you can only fix your portable LG air conditioner if you know what’s wrong with it and what to look for. Below is an LG portable air conditioner troubleshooting guide that answers that.

1.LG Portable Air Conditioner Not Turning On

Several issues could stop your portable air conditioner from turning on, and they include:

  • Power outage – Unless you have an alternative means of powering your LG air conditioner, you cannot do anything about an outage. So, confirm if there’s power or not. If there is, consider the reasons below.
  • Bad outlet – You may need to plug another appliance into the electric outlet to see if the outlet is in working condition. If the appliance does not power up, the outlet is faulty and needs replacing.
  • Tripped breaker – There is also the possibility that a tripped breaker could be preventing the AC from turning on. So, you need to check it in the breaker box and reset it if it’s off.
  • Loose or faulty power plug – Confirm that the power plug is properly plugged into the socket. If it is not, plug it in. if the AC still won’t turn on, test the power plug with a multimeter and replace it if it lacks electrical continuity.
  • Bad AC unit – If you still cannot find out why your LG AC won’t turn on, it could be because the unit itself is defective. So, you can also consider getting another unit.
LG Portable Air Conditioner Troubleshooting (9 Issues Solved!) (2)

2.LG Portable Air Conditioner Not Turning Off

What if your portable air conditioner turns on but won’t turn off? If so, then it’s likely because of the following:

  • Dirty condenser coils – If the condenser coils are dirty, the AC will work extra hard to compensate for their failure. That, unfortunately, may cause it to run nonstop. So, inspect the coils for dirt and check them.
  • Defective thermostat – Once the thermostat malfunctions, it may provide the compressor or the fan motor with uncontrolled voltage, causing them to run nonstop. So, consider checking its continuity with a multimeter to determine if it’s faulty and needs replacing (when it lacks continuity).
  • Defective thermistor – A bad thermistor fails to detect the room’s temperature changes, causing the AC to run nonstop. Thus check its continuity to determine if it’s faulty and needs replacing.
  • Bad temperature control board – Like a bad thermostat, a bad temperature control board may provide voltage to the compressor and fan motor nonstop. However, you need an expert to help you check and replace it.
  • Bad relay board – You may also need an expert to help you check the relay board for faults and replace it, which could be why the AC won’t turn off.

LG Portable Air Conditioner Not Blowing Air

If your LG portable AC won’t blow any air, warm or hot, it’s essential first to confirm that it’s the right size. Belowis a table matching residential room sizes to portable AC sizes you can use.

Room Size (Square Feet)AC Size (BTU Rating)
200 sq.ft7,000 BTU
200 sq.ft8,000 BTU
300 sq.ft10,000 BTU
450 sq.ft11,000 BTU
400 sq.ft12,000 BTU
500 sq.ft13,000 BTU
600 sq.ft14,000 BTU

If your portable AC is the right size, but it still won’t cool or heat, consider the issues shared below.

(Video) How to drain a portable AC without a hose

3. LG Portable Air Conditioner Not Cooling

As far as an LG portable air conditioner failing to cool goes, there are several possible reasons behind it. They include:

  • Wrong temperature setting – Your AC will only cool if it’s on Cool Mode or the lowest temperature setting. So, ensure that’s the case.
  • Leaky vent – The vent shouldn’t be loose, cracked, or torn, as cold air will leak out and warm air in. So, inspect the vent and replace it if it shows such signs.
  • Leaky windows, doors, or walls – If there are cracks on the windows, doors, or walls, they will leak hot air in and prevent the AC from cooling. So, you need to seal them if present.
  • Lack of clearance – Your AC needs a clearance of around 20 inches around it to cool properly. So ensure that’s the case.
  • A dirty filter, vent, or condenser coils – If the filter, air vent, or condenser coils are dirty, they’ll prevent the flow of cold air. So, you need to inspect the three and clean them.
  • Unstable room temperature – If your room temperature is inconsistent, the best you can do to enable the AC to cool is to raise its temperature.

Other Reasons for an LG Portable Air Conditioner Not Blowing Cool Air

  • Frozen coils – A frozen evaporator deters your AC from venting out warm air, and as a result, no cool air blows. You may need to leave your AC turned off for a while to thaw out the coil.
  • Low-speed fan – If you want your AC to cool, then the fan should be set at high speed. So, do that if it’s at a low speed.
  • Direct sunlight – If the sunlight directly shines on the AC, the AC won’t cool. You’ll need to move it away from sunlight.
  • Low refrigerant – If your AC is on low refrigerant (probably due to a leak), it won’t cool. You’ll need an expert to help you detect and fix the leakage.
  • Bad compressor – If the compressor doesn’t run, the AC won’t cool. You need to replace it if that’s the case, and an expert can help you.
  • Bad exhaust fan – Check the fan for wear and breakage and replace it, as it could be why the AC won’t blow cold.

4.Portable LG Air Conditioner Won’t Heat

Now, if your portable LG air conditioner won’t heat, it’s highly likely because of the following:

  • Faulty fan motor – Your air conditioner won’t blow hot air if the fan motor is defective. You’ll need to check it for wear or breakage and replace it if that’s the case.
  • Burnt circuit board – The AC will also fail to heat your space if the circuit board is burnt. That may happen following a power surge. But before replacing the circuit board, have an expert inspect it.
LG Portable Air Conditioner Troubleshooting (9 Issues Solved!) (3)

5.LG Portable Air Conditioner Not Draining

Sometimes the air conditioner won’t drain water, and the water may even flow backward. In such a case, consider these issues:

  • Disconnected or blocked drain line – If the drain line is disconnected or dirt blocked, your air conditioner won’t drain. So, you must check and fix it if it’s disconnected and use a thin wire to unclog it if it’s dirt-clogged.
  • Dirty condenser coils – The AC may also fail to drain if the condenser coils are dirty. So, you need to examine them and clean them if they are dirty.
  • Bad condensate pump – Lastly, consider replacing the condensate pump if the above fixes don’t work. The pump could be faulty.

6.LG Portable Air Conditioner Not Evaporating Water

If your LG portable air conditioner won’t evaporate water or keeps filling up with water quickly, it’s most likely due to one of these reasons:

  • High humidity – If the humidity level is high, especially during the summer, the AC won’t evaporate adequate water. You may need to supplement the AC with a dehumidifier if that’s the case to lower the humidity.
  • Dirty filter – A dirty filter can also prevent the AC from evaporating water. So, inspect the filter and clean it if it’s messy.
  • Poor drainage – If the water doesn’t drain, it won’t evaporate either. That means you should inspect the drain lines for clogging and clean them.
  • Bad condensate pump – Inspect the condensate pump for breakages, wear, and clogging and replace it if that’s the case. A faulty condensate pump won’t pump out water.

7.LG Portable Air Conditioner Remote Not Working

The remote control of an LG air conditioner rarely fails. So you have to consider these possibilities carefully:

(Video) Haier Portable AC | Buzzing and Not Cooling - FIX

  • Dead batteries – Replace the batteries, as they could be dead, especially if older than a year. Ensure they are correctly installed.
  • Long range – The remote might not work if you hold it more than 10 feet away. If so, you should move closer.
  • Dense barriers – If there is a thick barrier, especially a wall, avoid it. It could be blocking the remote’s signal.
  • Faulty remote – The remote itself could be faulty. So, consider operating without it, and if the AcCwork, replace the remote.
  • Bad main control board – If the remote won’t work even after replacing it, replace the main control board of your AC, as it could be faulty.
LG Portable Air Conditioner Troubleshooting (9 Issues Solved!) (4)

8.LG Portable Air Conditioner Compressor Not Working

Lots of the AC’s functions, including cooling, depend on a working compressor. So, it must work. Sometimes it doesn’t – mostly when one of these components fail:

  • Temperature control board – If the unit’s temperature control board is bad, it may cut off the compressor s voltage supply and prevent it from running.
  • Thermostat – A faulty thermostat may turn the fan motor alone, not the compressor.
  • Overload – The overload which protects the compressor from overheating and burning could have blown up (if it lacks continuity), thus resulting in a nonworking compressor.
  • Thermistor – Since the thermistor detects temperature changes, it may fail to turn on the compressor if it is faulty (lacks electrical continuity).
  • Capacitor – If the capacitor is burnt out, the AC compressor won’t work. Check it with a multimeter to determine if it needs replacing.
  • Main control board – The main control board could also be why the compressor is not working. So, have an expert check it.
  • Compressor – Sometimes, the compressor itself could be faulty, and you can tell if it doesn’t make any sound indicating it’s running.
  • Others – Other components that could be faulty and prevent the compressor from running include the relay board, start relay, and selector switch.


Consider getting a replacement for any of the above components if faulty.

9.My LG Portable Air Conditioner Compressor Keeps Shutting Off

Sometimes, the compressor would not turn on but run only briefly. That happens because of the following:

  • Overheating – If the AC is overheating, the compressor may keep shutting off. If so, you need to turn off the AC to allow it to cool.
  • Dirty condenser coils – The compressor could be turning off because it’s unable to breathe because of dirty condenser coils. If so, you’ll need to clean them.
  • Shorted compressor – A power surge could have short-circuited the compressor. If so, have an expert check and replace it.
  • Low refrigerant – A low refrigerant could also cause the compressor to shut off, and you need an expert’s help.

But How Do I Reset My LG Portable Air Conditioner?

Whether your LG air conditioner won’t turn on or runsnonstop, you can try resetting it, and here’s how to do it:

(Video) GE AC Unit Model AHC12LYW1 or ACH14AZW1 - Unit Beeps, Shuts Off, 88 Symbol Bypassed DIY | How to Fix

Option 1 – Press the Test/Reset/Power button on the portable AC’s power plug and wait for the unit to reset.

Option 2 – Press the control panel’s power switch for a few seconds to reset the control panel.

Option 3 – Unplug the air conditioner for about 10 seconds. Then press the power button once you plug it back.

LG Portable Air Conditioner Troubleshooting (9 Issues Solved!) (5)

LG Portable Air Conditioner Error Codes

Visit LG’s online error code troubleshooting page to get more information about your unit’s error code. But just an overview, here is a quick LG portable air conditioner troubleshooting table for the most typical error codes:

Error CodeMeaningWhat to Do
E1/E2/CH01/CH02Auto Stop ProtectionConsult an HVAC expert
E3/CH03No/low refrigerantConsult an HVAC expert
E4Defrost ModeWait for the defrosting to complete (10 minutes or so)
E5Full water collector tankDrain the excess water
P2/FLFull drain panAdjust the fan speed (lower it) and set the AC to Cool Mode
F1/F2/F3Fan ModeNothing to do as the fan is running normally

Closing Thought

Using the above LG portable air conditioner troubleshooting guide, you can fix your AC when it starts to malfunction.That includes when it won’t turn on or off, drain or evaporator water, cool or heat, or when its compressor or remote control won’t work.

(Video) LG Portable Air Conditioner - Indicator Codes

So, consider it alongside your LG air conditioner manual before calling an HVAC professional, as most of the issues are DIY-fixable.


How do I reset my LG air conditioner? ›

Unplug the unit for at least 30 seconds. Use a timer if necessary. Note: If the unit was not unplugged for at lest 30 seconds, the unit's safety switch will prevent the compressor from turning on for 3 minutes. Plug the unit back in.

Where is the reset button on an LG air conditioner? ›

To reset an LG air conditioner, usually, locate the reset button on the control panel. This button is normally situated near the power button and may be labeled “reset” or have a circular arrow symbol.

Why does my LG portable AC keep shutting off? ›

Dirty air filters or coils will restrict airflow which will reduce cooling performance. Also this may restrict airflow enough for the unit to overheat and cause the unit to shut down during normal operation.

Do portable air conditioners have a reset button? ›

There should be a test and reset button for a built-in breaker: press the “test” button to trip the breaker, then push firmly on the reset button and try to turn the air conditioner on again. If the unit still won't power up, make sure there's power to the outlet — a night light or reading lamp can help with this step.

How do you manually reset an air conditioner? ›

How to Reset an Air Conditioner
  1. Power down your AC. Start at your circuit breaker panel and flip the breaker that powers your AC. ...
  2. Find the button. Most air conditioning units are equipped with a reset button. ...
  3. Hold down the reset button for 3 to 5 seconds and then release.
  4. Restore power to your AC.

How do I reset my AC without a reset button? ›

How do you reset your AC unit?
  1. Turn off your air conditioning system using the thermostat. ...
  2. Search for the breaker box. ...
  3. Shut off your AC unit at the breaker. ...
  4. Wait at least a full minute before switching the breaker back to the “on” position.
  5. Wait for 30 minutes before turning your unit back on at the thermostat.

Where is the AC reset switch? ›

Look for it first around on the exterior of your machine, especially along the bottom edge near the ground. An AC's reset button is typically red and visible, so it should be easy to spot. If you don't see a reset button on the outside, it could be located inside the unit behind the service panel.

What does AC reset button look like? ›

Some air conditioning systems have a reset switch, which is a small, red button. Typically, the button will be on the outdoor unit. If you have a problem locating it on the outdoor unit, you may find relevant details on the equipment's manufacturer's manual. Press the red button for three seconds and release.

Why does my portable air conditioner shut off after a few minutes? ›

Check the setting and make sure the room temperature is warmer then what the unit is set at; check that the exhaust hose is connected to the unit properly and make sure there are no kinks or bends in the hose; check that the filter is clean and free of dust and debris.

Why does my portable air conditioner shut off every few minutes? ›

If your portable air conditioner is turning off and on every few minutes, your unit is probably too large for your room and is "short cycling." This happens when cold air from an oversized unit bounces off the wall and back towards the unit, creating a room temperature reading that's cooler than the actual temperature.

Why won t my portable air conditioner stay on? ›

The most common cause is a clogged filter. Remove the grill in the back of the unit and clean any excess dust off the filter with a brush or a vacuum, then rinse if off with some running water.

How long does it take for an air conditioner to reset? ›

After you've turned the system back on, it will take a bit of time for the air conditioner's internal circuitry to reset. It usually takes about 30 minutes, so sit tight until then.

How long to leave AC unit off to reset? ›

Wait 30 Seconds

After turning off the circuit breaker linked to the AC unit, wait for a full minute. Set a timer for 60 seconds and then return power to the AC unit. As a safety precaution, it may be a good idea to inform everyone in your household that you will be resetting breakers.

How long do portable air conditioners last? ›

Here's how long some of the most common types of AC last:

Portable AC — 5-10 years. Residential single whole-home AC unit — 15 years. Central air-source heat pumps — 15 years (and up to 20–25 years if well-maintained and in a well-insulated home)

Which is the reset button? ›

Alternatively called the reset switch, the reset button allows devices that utilize it, such as a computer or peripheral to be rebooted. Usually, the button is on the front of the device, next to or near the power button.

How do you troubleshoot an AC that won't turn on? ›

Eight Reasons Why Your AC Won't Turn On-And What to Do
  1. 1) Check the Thermostat. ...
  2. 2) Check the Air Filter. ...
  3. 3) Check the Circuit Breaker. ...
  4. 4) Check the Indoor Shutoff Switch. ...
  5. 5) Check the Outdoor Shutoff Switch. ...
  6. 6) Identify the AC's Reset Button. ...
  7. 7) Inspect the AC for Ice Buildup. ...
  8. 8) Ensure the Condensate Drain Isn't Clogged.

Why is my AC all of a sudden not working? ›

Check the Thermostat

When an AC suddenly stops working, the thermostat is usually the first thing you should check. Check the thermostat to see if it's on. You can also try changing the temperature on the thermostat to see if that kicks the AC into operation. The location of your thermostat can also affect your AC.

How can I get my AC to start working again? ›

Why Is My Air Conditioner Not Turning On?
  1. Make sure the outdoor breaker fuse is positioned correctly.
  2. Check your electrical panel for a tripped breaker.
  3. Confirm that your thermostat is switched on.
  4. Check for a clogged air filter.
  5. Check your condensate pump for proper operation.
Jun 25, 2021

Why does my LG air conditioner keep changing the temperature setting by itself? ›

This is called a demand response event. Now, this doesn't mean that your air conditioner will turn off, and you'd be sitting in a very hot room. With such an event, the thermostat changes by itself, and the temperature is only increased by a few degrees.

Where is my AC safety switch? ›

If you have a horizontal unit, the safety switch will be located in the secondary drain pan. If, on the other hand, you own a horizontal unit that doesn't have a secondary drain pan or you have a vertical unit, then the safety switch will be on the drainpipe.

Where is the switch on AC? ›

Both switches need to be in the "on" position for your AC to work. Typically, you can find the switch for the indoor unit near your system's furnace or air handler. You can find the switch for the outdoor unit next to the outdoor unit, usually in a metal box on the exterior of your home.

Is there a compressor reset button? ›

A reset button can be found inside the air conditioner's compressor. Typically, the button is red in colour and modest in size.

What is recovery mode on air conditioner? ›

When a thermostat is in recovery mode, this simply means it is recovering from being in an energy-saving mode. During recovery mode, your thermostat is working toward achieving a newer temperature that is cooler or warmer than the outside air.

What is the self clean button on air conditioner? ›

What is an auto-clean function? The auto-clean function will prevent the growth of harmful microorganisms by eliminating the moisture inside of the indoor unit. This function prevents rusting on the evaporator coil. Activate this function to provide cleaner and healthier air.

How do I force restart my LG? ›

Press and hold the Volume Down and Power keys simultaneously until the device reboots. Typically this will take 11-12 seconds.

What is the hard reset code for LG? ›

Turn the phone off. Press and hold the following keys at the same time: Volume Down Key + Power/Lock Key on the back of the phone. Release the Power/Lock Key only when the LG logo is displayed, then immediately press and hold the Power/Lock Key again.

Why does my AC keep turning on and off every 10 seconds? ›

Your AC unit turning on and off repeatedly is one of the most common AC problems homeowners face. It can be caused by dirty, damaged, failing components or electrical and mechanical factors. If your AC unit keeps turning on and off repeatedly, then it's probably experiencing short cycling.

Why does my AC turn off after 10 minutes? ›

AC Problems That Cause Your Unit to Shut Off

Unit is overheating: This often means there is simply a buildup of grime inside the compressor unit, but it could also mean there's a refrigerant leak or another problem.

Why does my compressor run then shut off? ›

Some of the most common issues that could be causing your compressor to shut off include the following: The ambient temperature is too high, or there's not enough ventilation. Oil levels are too low. You're using the wrong type of oil.

Is it normal for AC to turn on and off every 10 minutes? ›

A short AC cycle is also known as short cycling. It is an indication that something is wrong with your AC because the compressor keeps turning on and off in under 10 minutes. Since we know a cycle should last between 15 and 20 minutes, it's safe to say that 10 minutes is on the lower side.

Why does my AC turn on and off every 5 minutes? ›

If the wiring between the AC and the thermostat is faulty, or if the thermostat is miscalibrated, your AC may begin to short cycle. Your thermostat may not properly register the temperature inside your home, forcing the AC to repeatedly start and stop in order to reach the desired temperature.

Why wait 3 minutes before restarting air conditioner? ›

If the system is turned on without waiting for at least 3 minutes, the system can start with a pressure load. This pressure load prevents the system from cooling properly, which could affect the system in the long run.

Why is my LG AC not working after power outage? ›

Check if the circuit breaker is tripped.

Inspect the home's circuit breaker or the fuse dedicated to the air conditioner to see if it has been tripped or is blown. Reset or replace if necessary. If service is required. Please visit our Request a Repair page for further assistance.

Why does my air conditioner turn off after 30 seconds? ›

If your air conditioner only stays on for a few minutes at a time and shuts off before it has a chance to cool your home, this is called short-cycling. The issue is relativity common and can have a range of causes, from a clogged air filter to an oversized system.

Should I turn off my AC unit if it's not cooling? ›

If your ac is still not cooling there is one more thing you need to do. This is very important.... TURN IT OFF and call your HVAC service provider to assist you. We always tell our customers to turn off an ac that is not cooling properly.

What happens if you leave your air conditioner on all the time? ›

That blissful blast of cold air when you walk through your front door can seem like reason enough to keep your A/C working around the clock. But is it safe to leave air conditioner on all day? Running your air conditioner all day is generally safe, as in, it probably won't cause a fire or other disaster in your home.

Why is my AC not blowing cold air but running after power outage? ›

Reset the Circuit Breaker

If the power outage caused the circuit breaker to trip, you would need to reset it before the air conditioner is able to function properly again. This can be done by finding the circuit box responsible for your HVAC.

How long do LG air conditioners last? ›

Unlike furnaces, air conditioners are often outdoors and exposed to extreme temperatures throughout the year, which shortens their life expectancy. Modern air conditioners can last between 15-20 years, and older air conditioners last around 10-12 years.

Do portable air conditioners need to be serviced? ›

For effective particle abatement and optimal cooling efficiency, regularly clean or replace the filters in your portable AC. This should occur on a bi-weekly or monthly basis, depending on use.

How much does it cost to repair a portable air conditioner? ›

A portable air conditioner has a similar repair cost range of $80 to $250. These types of cooling units are usually more affordable to repair because they are smaller and have low-cost components. When it comes to central air units, homeowners can expect to pay between $100 and $500 for repairs.

Why is my LG air conditioner not blowing cold air? ›

If the air filter is clogged, air cannot flow properly through the air conditioner. This greatly reduces the cooling capacity of the air conditioner. In addition, if the air filter is clogged, the evaporator coils will frost over. To remove debris from the air filter, try cleaning the filter.

Why is my LG AC not cooling? ›

- Dry the filter under a shade of an airy place avoiding direct sunlight and reassemble it to the appliance. 2. Check if the air inlet of the appliance is blocked. If the air inlet is blocked by a curtain, it may decrease the air cooling performance and wind strength and it may occur the noise.

Why is my LG air conditioner not responding to the remote control? ›

First, try replacing the batteries in the remote control. If installing fresh batteries doesn't solve the problem and you can still operate the air conditioner manually, the remote control might be defective. If you think the remote control is defective, replace it.

Why is my AC running but not cooling? ›

If your air conditioner is running, but not lowering temperatures inside, one issue could be a blocked or clogged condenser coil. When operating correctly, the condenser fan draws air into the outdoor unit through the condenser coil to pull heat energy out of your home.

How do I get my LG air conditioner to work? ›

Press POWER. Use the Up and Down arrow keys to set the desired temperature. Press the MODE key repeatedly until "Cool" mode is selected. If needed, press the FAN key on the remote or control panel to adjust fan speeds.

Where is the AC sensor located? ›

The AC sensor on your thermostat is located near the evaporator coils. Indoor air moving toward the return vents passes by the sensor and coils. In turn, the sensor reads the temperature and checks if it matches what you've set on the thermostat.

How do you check if AC remote sensor is working? ›

Check the unit

To do so, press the buttons you'll find towards the bottom right side of the unit manually to see if they work. If they do, but do not respond to the remote, you can assume the signal from the remote is not reaching the unit or is not being recognised.

How do you unblock a blocked condenser? ›

How to Unclog Your AC Condensate Drain Line
  1. Turn off your air conditioner. ...
  2. Remove the cap from the pipe. ...
  3. Check to see if there is any debris stuck in the drain. ...
  4. Remove any visible debris and retest for proper drainage. ...
  5. Pour in Vinegar. ...
  6. Replace the drain cap. ...
  7. Remove the drain cap.
Oct 23, 2018

Why is my air conditioner not responding to my thermostat? ›

Clogged air filters are one of the most common reasons a thermostat clicks but AC does not turn on. A filter cleans the air before it circulates throughout your home, trapping dirt particles, dust, and pollen. Over time, these contaminants will clog the filter, limiting airflow to the HVAC system or furnace.


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Introduction: My name is Stevie Stamm, I am a colorful, sparkling, splendid, vast, open, hilarious, tender person who loves writing and wants to share my knowledge and understanding with you.