LG AC Not Cooling But Fan Is Running- 10 Solution
Are you experiencing issues with your LG air conditioner not cooling properly, even though the fan is running? Indeed, when a unit is working but not cooling, it’s a perplexing situation.
In such cases, you need to identify the root cause to implement an effective solution. By examining the potential reasons and suitable remedies, your AC can quickly return to its peak operation.
Let’s explore how to troubleshoot an LG AC not cooling but with a running fan.
Reasons For Lg AC Not Cooling But Fan Is Running
There are several possible reasons for this issue. Such as insufficient refrigerant levels, clogged air filters, damaged condenser coils, a faulty compressor, thermostat issues, Etc..
These issues can be resolved with simple troubleshooting steps. By below guidelines and troubleshooting tips you can restore your LG AC’s cooling efficiency.
Insufficient refrigerant
Most possible reason for an LG AC not cooling while the fan is running could be insufficient refrigerant.
Low refrigerant levels prevent the AC system from effectively absorbing heat, resulting in a reduction in cooling capacity. This can be caused by leaks or improper initial charging during installation.
How To Fix?
1. Leak detection: The technician will perform a thorough inspection of the AC unit to identify any leaks in the refrigerant lines or connections.
2. Repairing leaks: Once leaks are located, they should be repaired using appropriate methods, such as replacing damaged components or applying sealants, to prevent future leaks.
3. Recharge the system: After fixing any leaks, the technician will recharge the AC system with the correct amount of refrigerant specified by the manufacturer’s guidelines.
4. Test for functionality: The technician will ensure that the AC system is operating correctly by measuring temperature differentials, airflow, and cooling performance.
Clogged air filters
Another possible cause for an LG AC not cooling but with a running fan is clogged air filters. Air filters are responsible for capturing dust and debris from the air before it enters the unit.
When these filters become clogged with dirt and particles, it restricts airflow and reduces cooling efficiency.
How To Fix?
1. Turn off power: Make sure to switch off power to your AC unit from both the electrical panel and thermostat.
2. Locate air filters: Find where your AC’s air filters are located; typically, they’re behind a cover on either the front or side of your unit.
3. Remove filters: Carefully remove the filters from their housing, following the manufacturer’s instructions.
4. Clean or replace filters: If the filters are reusable, gently clean them using a vacuum cleaner or by rinsing with water. If they’re disposable, replace them with new filters.
5. Check airflow and reinsert filters: Before reinstalling the air filters, ensure there are no blockages in the filter housing or ductwork. Properly place the cleaned or replaced filters back in their original position.
6. Power on and monitor performance: After turning on the power, observe if the cooling performance improves. If not, further troubleshooting may be required.
Damaged condenser coils
A big cause for an LG AC not cooling while the fan is running could be damaged condenser coils.
The condenser coils play a vital role in releasing heat from refrigerant as it flows through them. Damage to these coils can impede heat transfer and result in inadequate cooling.
How To Fix?
1. Turn off power: Safely turn off the power supply to your AC unit from both the circuit breaker and thermostat.
2. Locate and access condenser unit: Find where your outdoor condenser unit is located; it’s typically situated next to your house or on the rooftop.
3. Clean coils: Carefully inspect the condenser coils for any dirt, debris, or damage. Use a soft brush or compressed air to clean off any accumulated dirt or debris on the coils’ surface.
4. Straighten bent fins: Gently straighten any bent aluminum fins on the coils using a fin comb or similar tool.
5. Repair damaged coils: If you notice any significant damage to the condenser coils, contact a professional HVAC technician to assess and repair them properly.
6. Monitor performance: After completing coil maintenance or repairs, restore power to your AC unit and observe its cooling performance. If the issue persists, further troubleshooting may be necessary.
Faulty compressor
A faulty compressor can be a potential reason for an LG AC not cooling while the fan continues to run.
The compressor is responsible for compressing the refrigerant and circulating it through the AC system. If the compressor malfunctions or fails, it can lead to insufficient cooling output.
How To Fix?
1. Inspection: The technician will conduct a thorough examination of the compressor, checking for electrical faults, refrigerant leaks, or mechanical issues.
2. Repair or replace: Depending on the extent of damage or failure, the technician will determine if repairs are possible and economical. In some cases, replacing the compressor might be necessary.
3. Professional installation: If a new compressor is required, it should be installed by a trained professional who can ensure proper connections and adherence to manufacturer guidelines.
4. Test operation: After repair or replacement, the technician will test the AC system’s functionality by checking compressor pressure levels and monitoring cooling performance.
5. Regular maintenance: To prevent future compressor issues, schedule routine maintenance with HVAC professionals who can inspect and maintain your AC system regularly.
Thermostat issues
The thermostat serves as a control device that signals when to turn on or off based on temperature settings. Malfunctions in thermostat sensors or settings can disrupt proper cooling operation.
How To Fix?
1. Battery check: Ensure that your thermostat has working batteries if it operates wirelessly or has battery backup capabilities.
2. Calibration check: Check your thermostat’s calibration settings and compare them with an accurate thermometer to verify accuracy. Recalibrate if necessary following the manufacturer’s instructions.
3. Sensor cleaning: Clean the thermostat’s sensor, located near its display or front panel, using a soft cloth and mild cleaning solution to remove any dirt or debris.
4. Thermostat location: Ensure that your thermostat is located in an area away from direct sunlight, drafts, or other heat sources that could affect its temperature readings.
5. Check wiring connections: Remove the thermostat cover and inspect the wiring connections to ensure they are secure and intact.
6. Resetting/factory reset: If all else fails, perform a reset or factory reset on your thermostat according to manufacturer guidelines.
Electrical problems
LG AC units may experience cooling issues despite the fan running if there are electrical problems. This can include faulty wiring, malfunctioning capacitors, or issues with the control board.
Electrical issues can disrupt the operation of the cooling system, resulting in inadequate cooling performance.
How To Fix?
1. Safety precautions: Ensure that all power to the AC unit is turned off before starting any work.
2. Check electrical connections: Inspect the wiring connections for any loose or damaged wires. Tighten or replace as necessary.
3. Test capacitors: Using a multimeter, check the capacitance and voltage of the capacitors located in the outdoor condensing unit. If they are faulty, they should be replaced.
4. Check control board: Examine the control board for any signs of damage or burnt components. If found, it may need to be replaced.
5. Call a professional: If you are not comfortable working with electrical components, it is best to contact a qualified HVAC technician to diagnose and repair any electrical issues.
Inadequate insulation
Inadequate insulatio reduces cooling efficiency in LG AC units, even when the fan operates normally. Poorly insulated ductwork or walls can allow heat transfer, causing reduced overall cooling performance.
How To Fix?
1. Identify insulation gaps: Inspect areas where insulation may be lacking such as around ductwork connections, air vents, or windows.
2. Seal gaps and cracks: Use appropriate sealing materials like weatherstripping or caulking to close any gaps or cracks that allow heat transfer.
3. Add insulation: If your walls lack proper insulation, consider adding additional insulation material such as fiberglass batts or blown-in cellulose insulation.
4. Insulate ductwork: Ensure that all ductwork is properly insulated, especially in unconditioned spaces like attics or crawl spaces.
Blocked airflow
Blocked airflow can significantly impact an LG AC unit’s cooling performance despite the fan functioning correctly. Obstructions in air vents, dirty evaporator coils, or blocked condenser units can restrict the flow of air and reduce cooling efficiency.
How To Fix?
1. Check air vents: Ensure that air vents are not blocked by furniture, curtains, or other objects. Clear any obstructions that impede proper airflow.
2. Clean evaporator coils: Turn off power to the AC unit and carefully clean the evaporator coils using a soft brush or vacuum cleaner. Remove dirt, dust, or debris that may have accumulated on the coils.
3. Clear debris from condenser: Inspect the outdoor condenser unit for any debris like leaves or grass clippings. Gently remove any obstructions that may restrict airflow.
4. Maintain regular cleaning schedule: Establish a routine to clean air filters and maintain a clean environment around the AC unit to prevent blockages and ensure optimal airflow.
Incorrect setting or mode selection
To troubleshoot an LG AC not cooling, despite the fan running, check for incorrect settings or mode selections on the thermostat control panel.
Incorrect temperature settings, improper mode selection (e.g., fan-only mode), or mistakenly enabled energy-saving features can all lead to insufficient cooling.
How To Fix?
1. Verify temperature settings: Double-check the desired temperature settings on the thermostat control panel. Make sure it is set to a temperature suitable for cooling.
2. Adjust mode selection: Ensure that the thermostat is set to the appropriate cooling mode, typically indicated by a snowflake or a cool icon. Avoid selecting fan-only or heating modes unintentionally.
3. Disable energy-saving features: Check if any energy-saving or sleep modes are enabled on the thermostat and disable them if necessary. These modes may limit the cooling capacity of the AC unit.
4. Reset thermostat: If there seems to be an issue with the thermostat’s programming, reset it to its default settings and reconfigure as needed.
5. Follow manufacturer’s instructions: Refer to the LG AC unit’s user manual for specific guidance on operating and troubleshooting your particular model.
Oversized unit
An LG AC unit that appears not to cool adequately with a running fan could be due to an oversized unit. Oversized units may cycle too quickly, leading to insufficient cooling performance due to inadequate time for proper cooling.
How To Fix?
1. Consult professional assessment: Contact an HVAC professional to perform an evaluation of your home’s cooling needs and determine whether your current AC system is correctly sized.
2. Consider equipment replacement: If your unit is significantly oversized, it might be necessary to replace it with a properly sized one.
3. Explore zoning options: Depending on your home layout, consider installing a zoned HVAC system that can regulate temperatures more efficiently in different areas.
4. Proper maintenance and airflow management: Regardless of size, ensure regular maintenance by cleaning air filters, inspecting ductwork for leaks, and maintaining unobstructed airflow around the outdoor condenser unit.
How Do I Reset my LG Air Conditioner?
Resetting your LG air conditioner can resolve issues like freezing, failure to turn on, or incorrect temperature readings.
Follow these simple steps to reset your unit:
- Locate the Filter and Mode buttons on your unit’s control panel.
- Press and hold both buttons simultaneously for three seconds.
- Release the buttons when you see “RESET” appear on the display.
- The unit will beep twice, indicating that it has been reset.
- Wait for a few minutes and then turn the unit back on.
Troubleshooting Issues After The Reset
After resetting your LG air conditioner, you may encounter several issues that need troubleshooting. If the unit does not respond after the reset, there are a few steps you can take to resolve the problem:
1. Check the power supply: Ensure that the air conditioner is properly plugged into a working power outlet. If necessary, try a different outlet to rule out any power supply issues.
2. Reset the circuit breaker: If the unit still does not respond, reset the circuit breaker. Turn it off, wait for a few minutes, and then turn it back on. This may help restore power to the air conditioner.
3. Verify proper installation and maintenance: Ensure that the air conditioner is correctly installed and that all connections are secure. Additionally, regularly clean or replace the air filters and ensure that the unit’s coils are clean.
4. Adjust temperature and fan settings: Make sure the temperature and fan settings are adjusted correctly. Experiment with different settings to see if the cooling performance improves.
5. Unresolved issues or error codes: If the unit still has issues or displays error codes, refer to the LG air conditioner’s manual for specific troubleshooting steps.
6. Seek professional assistance: If you are unable to resolve the issue on your own, consider contacting a professional HVAC technician for further assistance.
7. Contact LG customer support: If the problem persists, reach out to LG customer support for additional guidance or to schedule a service appointment.
Conclusion
Fixing an LG AC with a running fan but no cooling isn’t as challenging as it seems. There are manifold reasons behind this occurrence. Understanding these causes is the first key to unlocking a suitable solution.
Once you’ve examined possible culprits, from dirty filters to refrigerant leaks, you can seek appropriate corrective measures. Indeed, sometimes, the fix can be as simple as routine cleaning.
In more severe cases, professional assistance may be required. Either way, troubleshooting doesn’t have to be intimidating. After all, your ultimate goal is to restore your AC’s cooling performance, ensuring a comfortable environment.
