Your air conditioner running constantly without effectively cooling your home can stem from several issues, a common one being a blocked or clogged condenser coil.
Potential Causes and Solutions
Let's explore the common reasons why your AC might be running without actually lowering the temperature in your house:
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Blocked or Dirty Condenser Coil: The condenser coil, located in the outdoor unit, releases heat from your home. If it's covered in dirt, debris, or vegetation, it can't effectively dissipate heat.
- Solution: Clean the condenser coil. Turn off the AC unit at the breaker. Remove any visible debris. Use a fin comb to straighten bent fins. Gently spray the coil with a hose (avoid high pressure).
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Dirty Air Filter: A clogged air filter restricts airflow to the evaporator coil (indoor unit), causing it to ice up. This reduces the AC's cooling capacity.
- Solution: Replace or clean your air filter regularly (typically every 1-3 months).
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Refrigerant Leak: Low refrigerant levels reduce the AC's ability to cool.
- Solution: Contact a qualified HVAC technician to locate and repair the leak, and then recharge the refrigerant. Do not attempt this yourself, as refrigerants can be harmful and require specialized equipment.
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Ductwork Issues: Leaky or poorly insulated ductwork can result in significant cooling loss before the air reaches your living space.
- Solution: Inspect your ductwork for leaks or damage. Seal any leaks with duct sealant or foil tape. Consider adding insulation to your ducts.
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Oversized or Undersized AC Unit: An AC that's too small won't be able to keep up with the cooling demands of your home, especially during peak heat. An AC that is too big will cool too quickly and short cycle, reducing dehumidification.
- Solution: Consult with an HVAC professional to determine if your AC unit is properly sized for your home.
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Faulty Compressor: The compressor is the heart of the AC system. If it's failing, it won't be able to circulate refrigerant effectively.
- Solution: A faulty compressor typically requires replacement by a qualified HVAC technician.
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Evaporator Coil Issues: A frozen evaporator coil (indoor unit) restricts airflow and cooling capacity.
- Solution: Turn off the AC and allow the coil to thaw completely. Ensure the air filter is clean and that airflow is not obstructed. If the problem persists, contact an HVAC technician.
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Other Mechanical Problems: Issues with the blower motor, fan, or other components can also hinder cooling performance.
- Solution: Schedule a diagnostic appointment with a qualified HVAC technician.
Summary
If your AC is running but not cooling, start with simple checks like cleaning the condenser coil and replacing the air filter. If the problem persists, it's best to consult a qualified HVAC professional to diagnose and repair the underlying issue.
