Lg Air Conditioner: not turning on

Professional Repair Guide

What is this symptom?

If your LG Air Conditioner isn't turning on, you're likely facing a frustrating situation with no lights, fan, or compressor activity. This issue can stem from various causes, including power supply problems, remote control malfunctions, or internal component failures. Understanding these factors will help you troubleshoot effectively and restore comfort to your space.

Urgency: Medium

Important Tips for Lg Models

  • Official LG support acknowledges troubleshooting guides for power issues; specific error codes may be model dependent

Possible Causes

No electrical power to unit

How to Identify: No display or lights on indoor unit; check breaker position and power supply to outlet.

Part: Household power supply / breaker

Remote control or receiver issue

How to Identify: Indoor unit does not respond to remote but starts with manual or emergency button; remote display issues or no IR signal from remote.

Part: Remote control and indoor unit IR receiver

Internal safety or thermal fuse blown

How to Identify: Unit shows no activity despite power present; often after overheating or power surge.

Part: Internal thermal fuse or safety cutoff

Internal control board (PCB) failure

How to Identify: Unit receives power but no response to controls; no display or indicators; troubleshooting resets ineffective.

Part: Main control PCB

Remote signal obstruction or interference

How to Identify: Remote commands not received but unit still has lights when powered manually; obstruction between remote and unit.

Part: Remote signal path

DIY Solutions

Check power supply and breaker

Easy 5 minutes
  1. Ensure AC breaker in main panel is ON
  2. Verify outlet or wall power to AC indoor unit is live
⚠️ Safety First: Do not touch live wires; ensure breaker off before accessing panel if unfamiliar

Test and replace remote batteries / check IR signal

Easy 5 minutes
Tools Needed: Smartphone (to see IR), New batteries
  1. Replace remote batteries
  2. Use smartphone camera to check IR LED when pressing buttons
  3. Point directly at unit sensor and attempt to start

Reset unit power (power cycle)

Easy 10 minutes
  1. Turn off breaker or unplug for 3–5 minutes
  2. Restore power and attempt to start unit

Professional Repairs

Replace internal thermal fuse or safety components

Estimated Cost: $50 - $150

Replace main control PCB

Estimated Cost: $150 - $350

When to Call a Professional

Unit still shows no power after power supply check, remote check, and reset
Signs of electrical burning or smell
Repeated breaker trips

Preventive Maintenance

  • Check and clean filters regularly: Overheating that might trigger internal safety cutoffs
    Frequency: monthly
  • Periodically test remote and replace batteries: Unresponsive remote controls
    Frequency: every 6 months

Frequently Asked Questions

Why is my LG Air Conditioner not turning on?
Common causes include no electrical power, remote control issues, or internal fuse failures.
How do I fix LG Air Conditioner not turning on myself?
Check the power supply, replace remote batteries, or reset the unit by cycling the power.
How much does it cost to fix not turning on?
Professional repairs can range from $50 to $350 depending on the issue.
When should I call a technician for not turning on?
If DIY solutions don't resolve the issue, or if there's a suspected internal component failure.

References & Sources

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

75%
DIY Success Rate Difficulty: Either

Common Issues Reported by Users

  • Faulty power supply or tripped circuit breaker
  • Defective remote control or batteries
  • Malfunctioning control board or display issues

User Suggested Solutions

  1. Check the power supply and reset the circuit breaker. Ensure the unit is plugged in and the outlet is functioning. If the breaker has tripped, reset it and try turning on the AC again.

  2. Replace the batteries in the remote control or test the remote with a different device to ensure it is functioning. If the remote is defective, replace it.

  3. Inspect the control board for any visible damage or burnt components. If the display is flickering '8.8', it may indicate a need for control board replacement. Consult the user manual for specific instructions.

Analysis based on 1 community discussions
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Air conditioner display flickering upon plugging in - unable...

Community Discussions

display flickering with '8.8' and won't turn on

display needs to be replaced

Pro needed View on Reddit →

Source: Reddit r/appliancerepair

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