Whenever your air conditioning malfunctions during probably the hottest months, the culprit is usually a combination of several typical issues.
Knowing these might enable you to take action to avoid disrupting your comfort.
Here are 50 different factors that lead to AC failures:
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Dirty air filters
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Low refrigerant levels
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Faulty thermostat
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Blocked condenser coils
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Dirty evaporator coils
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Compressor failure
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Electrical issues
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Improper installation
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Clogged drain line
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Worn fan motor
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Malfunctioning start relay
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Sensor malfunctions
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Broken fan belt
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Refrigerant leaks
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Overheating compressor
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Short cycling
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Frost buildup
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Duct leaks
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Bent fan blades
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Dirty condenser fan blades
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Lack of maintenance
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Faulty wiring
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Failing capacitor
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Defective contactor
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Low airflow
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Blocked air ducts
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Poor insulation
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Oversized unit
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Undersized unit
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Vibration damage
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Oil leaks
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Thermal overload
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Incorrect refrigerant charge
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Imbalanced pressures
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Frozen coils
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Clogged drain pan
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Water damage
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Faulty pressure switches
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Misaligned compressor
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Corroded components
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Excessive humidity
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Dirty condenser fins
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Leaking ductwork
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Insufficient refrigerant oil
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Faulty expansion valve
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Dirty blower wheel
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Mechanical wear
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Inadequate cooling load
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Improper duct sizing
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Poor electrical connections
Conclusion
Frequently, AC failures are caused by preventable issues.
Keep filters clean, maintain correct refrigerant levels, and keep your coils free of debris—many common issues interrupt your comfort.
Rely on professionals like PRO Electric plus HVAC for routine maintenance and prompt fixes so your home remains cool and inviting year-round.
