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[LG Air Conditioner] Perform a Pre-Summer Check to Stay Cool — LG

Run a quick self-check to resolve simple issues while saving time and money. Checking your unit before the summer heat arrives can also help prevent major breakdowns.

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TroubleshootingAir Conditioners

What to Check First

  1. - Check the outlet connection. ➔ If you unplugged the unit after last summer, plug it back in before running a self-check.
  2. - If you’re using a power strip, check this first. ➔ Do not use a power strip or extension cord. Plug the power cord directly into a wall outlet. ➔ If using a power strip is unavoidable, use a power strip rated for air conditioners. ※ Note: Ensure the power strip's maximum capacity meets the product specifications listed in the owner's manual.
  3. - Check that the plug fits snugly in the wall outlet. ➔ If the outlet is loose or does not hold the plug firmly, have the outlet replaced by a qualified electrician.
  4. - Check the wall outlet for burn marks. ➔ Check for burn marks on the outlet slots or on the power plug. If you see any scorch marks, have the outlet or power plug replaced by a qualified electrician.
  5. - Check the dedicated air conditioner circuit breaker. ➔ If your model uses a dedicated circuit breaker, switch it to ON. ※ Note: 2021 and newer models require separate power connections for the outdoor unit, floor-standing indoor unit, and wall-mounted indoor unit. Refer to the user manual for more details.
  6. 1. On an Android phone, open the Camera app and point the camera lens at the top of the remote control.
  7. 2. Look at your phone screen and press the [Start/Stop] button on the remote repeatedly. If you see a red light blinking on your phone screen, the transmitter is working normally.
  8. 3. If you see the light but the unit still doesn’t respond, the receiver on the floor-standing or wall-mounted unit may need to be checked. If the issue persists, contact LG customer support for service.
  9. Unplug the power cord for safety before cleaning.
  10. Pull the filter handle on the back of the unit sideways to remove the filter.

Why This Can Happen

Symptoms can have more than one cause, and the correct steps depend on the exact model, installation and operating conditions. Use the checks above to narrow the issue before service.

Safety and Model-Specific Guidance

Stop troubleshooting if you notice burning, electrical damage, unsafe heat, gas odor, refrigerant concerns, or water near electrical components. Follow the official LG USA instructions for your exact model.

Frequently Asked Questions

What should I check first for [LG Air Conditioner] Perform a Pre-Summer Check to Stay Cool?

- Check the outlet connection. ➔ If you unplugged the unit after last summer, plug it back in before running a self-check.

When should I stop troubleshooting and contact LG?

Stop if the product shows signs of electrical damage, burning, leaking near electrical components, or if the recommended checks do not resolve the issue. Use LG USA support for model-specific service guidance.

Does this guidance apply to every LG model?

Not always. Controls, error codes and service steps can differ by model. Confirm the exact model number and follow the linked LG USA article for model-specific instructions.

Related LG Products

These model pages are linked because the stored category or exact model matches this Help Library topic.

Buying Guides for This Product Type

Features & valueAir Conditioner Features Worth Paying For — Value GuideEfficiency & running costAir Conditioner Efficiency, Energy & Running-Cost GuideHousehold use caseAir Conditioner Family & High-Use Household GuideFit & installationAir Conditioner Fit, Installation & Delivery Planning

Related Help Articles

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Read the Official LG Guide