LG Air Conditioner Not Turning On? Top 6 Causes (+ Fixes)

LG makes great air conditioners that combine style, technology, and functionality. However, even the best air conditioners can encounter power issues from time to time.

If your LG air conditioner isn’t turning on, possible causes include blown fuses, circuit board issues, frayed power cord, overloaded sockets, a faulty remote control, and damaged internal components. Some fixes are relatively simple, but an internal problem may require replacing your A/C unit.

In this article, I’ll discuss in detail how LG air conditioners function, the causes of air conditioner malfunctions, how to fix them, and ways of maintaining the conditioners to reduce repairs and extend their shelf-lives. I’ll also share the easiest way to fix your AC power issues. (Check the bottom of the article.)

Let’s get started!

Lack of Power

Air conditioners require electricity to function. If at some point their connection to electricity stops, then an AC won’t turn on.

Check the Plug

Wires are so easy to trip on and unplug. Make sure the air conditioner plug is pushed into the socket /power outlet completely.

Check the Fuse

Modern air conditioners have an internal fuse for protection. If the air conditioner doesn’t turn on, it may be that the fuse is blown.

• Check the fuse box to see whether it’s functional. To verify that you are getting power, unplug the air conditioner and remove the fuse box’s cover.
• If the fuse is blown (high voltage power may have caused a blown fuse), replace it only with the proper replacement and rating.

Circuit Board Issues

To verify circuit board functionality, read the operation manual. An electric LG Air Conditioner has an internal fuse. Open to check whether the fuse is damaged and replace it with an identical model. You can find an LG circuit board on Amazon.

Frayed Power Cord

The power cord may also have been improperly installed or damaged. Over time, power cords may become frayed due to excessive and heavy usage. This poses the risk of electrocution and fire hazards.

• Don’t extend the power cord by attaching any wires to it; this may result in power spikes. Extending the cable may risk the air conditioner through intermittent power supply or heat spikes.
• Extending a power code is a code violation and can lead to legal action, especially when there is property damage or injury due to negligence. If you are using a newer model, check the in-built circuit breaker installed in the power cord to see if it is tripped.
• If the power cord is in good condition, confirm the terminal strip voltage using a multimeter. If defective, please replace the strip, do not attempt to repair or modify it.

Power Connection

It is imperative to have a stable power connection in the room where the air conditioner is installed. I recommend using an AstroAI Digital Multimeter to verify there is power flow.

If the issue is the power supply, wait for approximately 3 minutes to restart the air conditioner to prevent a circuit trip once you restore the power.

Check for Overloaded Sockets

• Ensure the sockets aren’t overloaded and that the power circuit breaker is not tripped.
• Dedicate an entire socket solely to the air conditioner. Overloaded power sources decrease the power supply to the air conditioner, which won’t turn it on.

Electrical Wiring Issues

• Check your appliances and lights for flickers or any unusual sound emissions
• Electrical wiring issues may especially arise after remodeling a house because remodels often disrupt wiring cables
• Exposed wires or loose wire connections may also bring electrical issues
• You may need to call a certified electrician if there is a problem with your wiring

Ground the Appliance Properly

Make sure the air conditioner is mounted correctly. If the AC was improperly disrupted for some reason, then there may have been an interference in the cables and power source.

Tilting usually happens when you move houses, and someone accidentally pushes an object against the AC and disrupts the wall where it’s mounted.

Use an Adapter

You should not use an adapter. However, if you must, then you should only use the recommended UL-Listed Adapter.

For more information about air conditioning power issues, watch the following videos by Watch Joe Cools Air Conditioner and Barnacules Nerdgasm:

Non-Responsive Remote Control

Your air conditioner will refuse to function if the remote control isn’t configured correctly. Remote controls are battery-powered.

• Check the batteries’ slot to ensure that the batteries are correct and are installed in the right way.
• Leaky batteries will damage your remote control completely. To prevent leaky batteries, ensure that you replace them regularly.
• Move closer to the air conditioner to get the remote into its sensor’s range.

To find out more about remote control issues, watch this video:

LG Air Conditioner Components Need Repair

When an air conditioner has enough power and the remote control works, then it could be that something in the cooling system is damaged and needs repair. Here’s what to check for:

Check the AC Drain Pan

Under the air conditioner is a drain pan designed to accumulate residual condensation that your AC wasn’t able to drain out. A float switch stops your air conditioner from leaking into your room with residual condensation.

• Drain pans tend to become clogged over time, causing the condensate to spill into your drain pan.  
• It is advisable to have a secondary drain pan to prevent this leakage. Once your drain pan drain is clogged and your drain pan is full, the float switch will automatically turn your AC off. 
• You will not be able to turn your AC on until you clean out your drains and the float switch goes back down.

Check the Air Filters

Air filters tend to get clogged due to the accumulation of dust and water particles. This pile-up of dust and other solid particles hampers the flow of air in your AC. I recommend regular checking and draining of the filters.

Remember to turn off the electricity that connects with the AC before checking the air filters to see whether they are clogged.

• Condenser lines tend to accumulate debris over time, reducing the AC’s efficiency; ensure you regularly clean the evaporator coils and condenser lines.
• Use white vinegar while cleaning debris out of the evaporator coils and perform regular maintenance of the AC.

Motor Issues

If your motor is damaged, the AC will make unusual sounds. A capacitor test can resolve this.

Check the Thermostat

This is the AC’s temperature control system. The thermostat regulates the AC’s temperature by initiating the running of components both inside and outside of the room or home. Always ensure that:

• Your AC thermostat has power
• It’s set to cool mode
• Set the temperature below the room temperature

Other Issues and Solutions

• Common issues such as dead batteries also stop your AC from turning on, so replace them regularly. A bulb sensor in the thermostat is used to control the air temperature in the room and turns on a compressor circuit until the desired temperature of your room. 
• You can check the thermostat’s continuity with a multimeter as well.
• Check the air conditioner on and off switch. It could be that it has not been turned on manually.

The Easiest Fix for an LG Air Conditioner That Won’t Turn On

If you don’t have the time or expertise to troubleshoot and fix an LG air conditioner that won’t turn on, the smart decision — as you know — is to hire a A/C repair expert to fix it for you.

The problem is that finding a trustworthy and affordable repair service — and actually booking an appointment with them — can feel like pulling teeth.

Some services never call you back. Others charge criminally high rates. The best options are often booked out for months… and the worst don’t even fix your oven. (But they charge you for it anyway.)

To save you from that teeth-grinding frustration and bring you fast and affordable repairs from top-rated pros, I’ve partnered with a company called Networx. They work with thousands of contractors across the United States, and they make it easy for you to get free air conditioner repair quotes from the best repair services near you.

Here’s how it works in 7 easy steps:

1. Go to the form below.
2. Select your type of air conditioner in the dropdown menu. Options include Central A/C Repair, Ductless (Mini-Split) A/C Repair, and Window A/C Unit Repair.
3. Add some basic contact information and a brief description of your problem. (Your information will only be used to provide you with A/C repair quotes.)
4. Click the “Get Free Quotes” button when you’re done.
5. Our repair service partner will contact multiple vetted A/C repair experts near you. They’ll explain your problem and ask each service to contact you with a free quote.
6. You’ll receive an email or phone call with repair quotes from each service. You can choose the most affordable option and schedule your repair directly with them.
7. They’ll come to your house and fix your oven. Problem solved!

Using this form to find the best repair rates is 100% risk-free. There is zero obligation to hire any of the vetted contractors who contact you.

Fill out the form now to get free quotes from trusted A/C repair services in your area.

Steve Rajeckas

Steve Rajeckas is an HVAC hobbyist with an avid interest in learning innovative ways to keep rooms, buildings, and everything else at the optimal temperature. When he’s not working on new posts for Temperature Master, he can be found reading books or exploring the outdoors.