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Blog PageWhen summer heat peaks, the last thing you want is your AC not blowing cold air. Unfortunately, this is one of the most common HVAC problems homeowners face. If your air conditioner is running but failing to cool, the issue could be something simple - or a sign that professional repairs are needed.
In this article, we’ll break down the most common reasons your AC isn’t cooling properly and what you can do about it.
A clogged filter restricts airflow, which can make it seem like your AC isn’t blowing cold air. Over time, dust, dirt, and pet dander can block the filter, reducing efficiency and cooling power.
Solution: Replace or clean your air filter every 1 - 3 months, depending on usage, pets, and household size.
Refrigerant is the cooling agent that absorbs heat from inside your home. If refrigerant levels are low, often due to leaks, your AC won’t be able to cool the air effectively.
Solution: Only a licensed HVAC technician can detect leaks, repair them, and recharge the refrigerant. Don’t attempt this as a DIY fix.
Sometimes the problem isn’t with the AC itself but with the thermostat. Incorrect settings, faulty wiring, or a broken thermostat sensor can cause the system to blow warm air.
Solution: Double-check that the thermostat is set to cool mode and at the right temperature. If issues persist, HVAC replacement may be necessary.
When airflow is restricted or refrigerant levels are low, the evaporator coils can freeze. This ice buildup prevents the coils from absorbing heat, resulting in warm air blowing from your vents.
Solution: Turn off the AC to let the ice melt. Then, replace the air filter and call a professional to inspect for deeper issues.
Located in the outdoor unit, condenser coils release heat outside your home. If they’re covered in dirt, leaves, or debris, the system struggles to expel heat - making it harder to produce cold air.
Solution: Clean the outdoor unit regularly. Always cut power to the system before attempting to remove debris.
Faulty fans, damaged compressors, or electrical problems can stop your AC from cooling. These issues typically require immediate professional attention to avoid further damage.
Solution: Contact an HVAC technician for diagnosis and repairs.
If your unit is too small for your home’s square footage, it will run continuously without ever fully cooling your space.
Solution: Consult an HVAC professional to determine whether your system is properly sized. Upgrading to the correct capacity may be necessary.
•AC is running but blowing only warm air
•Strange noises or burning smells
•Water is leaking around the unit
•Sudden spike in electricity bills
•Frequent short cycling
•Change filters regularly
•Schedule annual HVAC maintenance
•Keep vents and registers unobstructed
•Clean debris around the outdoor unit
•Monitor thermostat settings
If your AC is not blowing cold air, the culprit could be anything from a dirty filter to low refrigerant levels. While some fixes are simple - like replacing filters - others require professional service.
Pro tip: Stay proactive with regular maintenance. A little care goes a long way in preventing costly repairs and keeping your home cool all summer long.
