A humming sound coming from the fan in your LG air conditioner could be caused by a few different factors. Here are some common reasons why the fan might be making this noise:
Dust and debris: Over time, dust and debris can accumulate on the fan blades, causing an imbalance and resulting in a humming noise as the fan spins. Cleaning the fan blades and the surrounding area can often resolve this issue.
Loose components: Vibrations from the fan motor or other internal components may cause screws or other parts to become loose. Check for any loose screws or components and tighten them if necessary.
Fan motor issues: The motor that drives the fan may develop problems, such as worn-out bearings or misalignment, leading to the humming sound. A faulty motor may need to be repaired or replaced.
Fan blade damage: If the fan blades are damaged or bent, they may create a humming noise as they spin. Inspect the fan blades for any visible damage and replace them if needed.
Mounting issues: The fan assembly is typically mounted securely within the air conditioner. If the mounting brackets or screws become loose or damaged, it can cause vibrations and humming sounds. Ensure that the fan assembly is properly secured and tightened in place.
Fan blade hitting something: Occasionally, foreign objects or debris may get lodged in the fan housing, causing the blades to strike them as they spin. This can result in a humming or rattling noise. Carefully inspect the fan housing for any obstructions and remove them if found.
If the air conditioner is still under warranty, it's advisable to contact LG's customer support or an authorized service center to have the issue diagnosed and resolved professionally. If the warranty has expired, you can try troubleshooting and fixing minor issues yourself if you have some technical expertise. However, for more complex problems or if you're unsure about the repair process, it's best to seek assistance from a qualified HVAC technician to avoid causing further damage to the unit.