Why Is Your AC Running But Not Cooling The House?


How does it feel when your AC is running but not cooling the house during the dog days of summer? Naturally, you would feel disgusted and vent your anger on your AC. But doing this won’t solve your issues. Instead, it will aggravate your problem. All you need to do is figure out the following reasons:

Leaking Refrigerant

  • Leakage of refrigerant could be one of the reasons your AC is not cooling your house. What do you know about refrigerants? It is a type of fluid inside your AC system’s copper coils. The role of this fluid is to absorb heat from the air in the evaporator coil. Remember that each system must have the required refrigerant to work correctly. If the refrigerant leaks out, it will negatively impact your AC system’s ability to cool the air. 

  • So, it would help if you detected the refrigerant leakage. And if it is so, you should focus on repairing the leak rather than supplying more refrigerant to your AC system. Fixing problems with refrigerant leakage is not easy. Let trained technicians do it for you.

Issues in Thermostat

If your AC is running but not cooling the house, there might be technical issues with your thermostat settings. The reasons could be that someone changed the thermostat’s fan setting or temperature. So, ensure it is set for cooling and not for “fan only.” If, despite the correct setting, the problem persists, then you should switch over to the next step.

Frozen Evaporator Coil

Another reason for your AC not cooling your house could be a frozen evaporator coil, which happens when not enough air passes over the coil to prevent the liquid in the coil from freezing. Under this condition, you must turn your AC off and wait for half an hour, allowing your system to run on “fan-only” until the coil is no longer frozen. If this fails to happen, call your technician.

Clogged or Dirty Filter

  • A clogged or dirty air filter could also be one of the reasons for your AC’s failure to cool your house. Under this condition, you should locate your air filter and inspect it visually. If you spot debris or dirt, change your air filter immediately.
  • Remember to change the air filter once every month. Doing this gives you cleaner air and ensures proper air circulation in your AC system. On the contrary, if the air filter appears clean and still does not cool your home, you should move on to the next step.

Checking For Clogged Coils

Checking the outdoor coils is very easy. All you need to do is go outside and inspect the condenser visually. Check to see if there is any debris or shrubs close to the unit and if the coils appear clogged with dirt, grass clippings, or other debris. If you find these obstructing things, wash the outside of the unit with a hose. However, if the problem does not disappear, it is time to call a technician.

In A Nutshell

There could be many reasons your AC is running but not cooling the house. You might be able to find a particular reason and try to fix the problem. But if you have tried all the remedies described above and still cannot fix it, you must call a qualified technician.

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