LG Air Conditioner: not turning on
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.
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
- Ensure AC breaker in main panel is ON
- Verify outlet or wall power to AC indoor unit is live
Test and replace remote batteries / check IR signal
- Replace remote batteries
- Use smartphone camera to check IR LED when pressing buttons
- Point directly at unit sensor and attempt to start
Reset unit power (power cycle)
- Turn off breaker or unplug for 3–5 minutes
- Restore power and attempt to start unit
Next step
Choose the next step for not turning on
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
HVAC Control Board
Controls fan, compressor, sensor, and communication functions in the HVAC unit.
- Typical part-only price
- $90 - $320
- DIY difficulty
- Hard
- Estimated time
- 45-120 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Model-compatible Air Conditioner parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
Model-Compatible Washable AC Filter
A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.
Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Professional Repairs
Replace internal thermal fuse or safety components
Replace main control PCB
When to Call a Professional
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?
How do I fix LG Air Conditioner not turning on myself?
How much does it cost to fix not turning on?
When should I call a technician for not turning on?
References & Sources
- LG Air Conditioner Power Not Turned On (Support) Official
- LG AC troubleshooting guide Repair-Blog
Community Analytical Insights
Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions
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
-
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.
-
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.
-
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.
Limited-source guidance; percentages and success-rate claims are not shown
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
Community Discussions
display flickering with '8.8' and won't turn on
display needs to be replaced
Source: Reddit r/appliancerepair
User Comments (0)
Share your experience or solution below.
Please login to post a comment.
Be the first to comment!