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Why Is My AC Blowing Cold Air But Not Cooling House?

Why Is My AC Blowing Cold Air But Not Cooling House?

From incorrect thermostat settings to a dirty filter, there are a number of reasons your air conditioner may continue to run but not cool the home. Here are the most common reasons:

  • Thermostat Is Set Incorrectly
    When your house starts to get a bit warmer than usual, check the thermostat controls first. Make sure it’s set to cool. Check the temperature setting if you’re sure someone hasn’t changed it. If it’s off, reset it to heat or constant fan (sometimes just labeled “on”), and return it to cooling mode. Wait a few minutes for the AC to kick back on and cool your home.

  • Filter Is Dirty
    A clogged or dirty filter will block airflow and reduce efficiency. This is an easy DIY fix; just check to see how dirty it is—if it’s covered in dust and dirt, it needs to be replaced.

  • Condensor Is Clogged
    The condenser is the large fan unit outside your home. It helps expel heat from the refrigerant. If it’s covered in leaves or other debris, that can block airflow and prevent proper cooling.

  • Evaporator Coil Is Frozen
    The evaporator coil, located inside the air handler or furnace, absorbs heat as the refrigerant passes through it. If your coil is frozen, it will restrict airflow and prevent proper cooling.

  • Refrigerant Leak
    A refrigerant leak can lead to your air conditioner not blowing cold air, the system running longer periods without adequately cooling your home, or a damaged or failing compressor that results in the complete system shutdown.

  • An Undersized AC Unit
    If your home isn’t cooling properly, it could be because your air conditioner is too small. An air conditioner that’s too small won’t be able to cool your home sufficiently on hot days.

If your AC unit isn’t cooling as expected, it’s time to contact Accurately Controlled Environments for an inspection today!