Here are 10 common AC problems and their possible solutions:

  • Air Conditioner Is Not Turning On. …
  • Air Conditioner Not Blowing Cold Air. …
  • Air Conditioner Freezing Up Outside Unit. …
  • AC Refrigerant Leak. …
  • Air Conditioner Making Noises. …
  • Frozen Evaporator Coil. …
  • Electric Control Failure. …
  • Air Conditioner Leaking Water Outside.

Why is my air conditioner running but not cooling the house?

Condenser Unit is Blocked

If your air conditioner is running, but not lowering temperatures inside, one issue could be a blocked or clogged condenser coil. When operating correctly, the condenser fan draws air into the outdoor unit through the condenser coil to pull heat energy out of your home.

What are the most common AC problems?

10 Most Common AC Problems You Could Face

  • AC Running Constantly.
  • AC Not Turning On.
  • No Cool Air Flowing.
  • Hot Air Blowing Out.
  • Refrigerant or Water Leaking.
  • Unit Turning On and Off Repeatedly.
  • A/C System Freezing.
  • Air Conditioner Tripping Circuit Breaker Repeatedly.

How do you diagnose home AC problems?

The Issue: Your AC Turns On But Isn’t Cooling

  1. Check the thermostat to make sure it’s working properly.
  2. Take a look at the condenser to see if it’s dirty or blocked. …
  3. Clean and/or change your filter (We recommend once a quarter.)
  4. See if any ice has formed on the coils. …
  5. Check and/or clean the outdoor compressor.

How do I fix my home AC problem?

If your AC is not cooling but runs:

  1. Turn off the power.
  2. Clean or change the air filter to improve airflow.
  3. Look to see if ice has formed on the coils and, if it has, turn on the power and the fan to melt it.
  4. Clean the condensate drain.
  5. Finally, check and clean the outdoor compressor.

Should I turn off my AC if it is not cooling?

So, if your air conditioner isn’t cooling, and you suspect a refrigerant leak, or if you’ve checked the air filter and thermostat to no avail, yes, you should shut your air conditioner off and call us right away. For professional AC repair in Kennesaw, GA look no further than Dayco Systems.

Why is my air conditioner not cooling my house below 80 degrees?

Change the Filter

If your filter is loaded with dust and dirt, it could be causing your air conditioner to not run effectively. If you haven’t changed your filter lately, now might be the time to do so. Filters keep dust and other contaminants from building up in your air conditioner.

What are the common causes of air conditioner failures?

6 Common Causes of A/C Failure

  • Faulty Circuit Breaker or Fuse. In the case of air conditioner failure, the first things you should check are your circuit breaker and fuse. …
  • Refrigerant Leak. …
  • Frozen Coil. …
  • Damaged Fan Blades, Compressor, Electrical Connections and Contacts. …
  • Neglecting Annual Maintenance. …
  • Faulty Thermostat.

Why does my AC go out every year?

One of the typical reasons air conditioners don’t work properly is a clogged or dirty filter. Follow the manufacturer’s suggestions as to how often to change your air filter. Some are monthly, others every three months, while some are reusable and should be cleaned when they are dirty.

Why is my outside AC unit not running?

AC not turning on could be the result of a blown fuse located at something called a safety shut-off box. This should be found close to your AC unit. Check to see if you have a blown fuse, and be sure to replace it if that’s the case. Even if the fuse doesn’t appear to be damaged, go ahead and replace it anyway.

Why is my central AC running but not blowing air?

If the AC unit is running, but there is no air through the vents, you are likely dealing with a fan capacitor that has reached the end of its life. Fan capacitors help get your HVAC system’s outdoor and indoor fan motors blowing and your compressor running.

How do you test an outside AC unit?

Make sure the AC hasn’t been turned off. Typically, there’s an on-off switch in a small box near the outside unit. Check the circuit box in your home to make sure the breaker for the outside unit hasn’t tripped. If it has, turn it all the way off, then flip it back on.

Why does my outside AC unit run even when the AC is turned off?

If your air conditioner keeps running when it’s turned off this could be a sign of shorted thermostat wiring. A continuously running air conditioner could also be triggered based on the settings selected for the unit.

Should AC fan be on auto or on?


Keeping your fan on AUTO is the most energy-efficient option. The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside.

Why does my AC compressor shut off after 2 3 minutes?

The unit has been overheated

Once it has reached a dangerous temperature, the unit shall turn off to increase its longevity and avoid a power-cut. Since sludge or grime buildup is not uncommon in cooling systems, the compressor should be cleaned with a dry cloth at the earliest to keep it from breaking down completely.

Why does my central air conditioner keep running?

One of the most common reasons an air conditioner runs constantly is restricted airflow. Your AC needs a certain amount of airflow in order to supply your home with cool air. If something is blocking the airflow to your AC, your system will run longer in an effort to bring in a sufficient amount of air.

Is it bad for AC to run all day?

The constant running of your AC unit will reduce pressure in the evaporator, or cooling coil until it freezes over, according to Cool Today. This is why in some cases, this constant running can be dangerous. The freezing of the coil can cause liquid refrigerant to flood back into the unit’s compressor and damage it.

How many hours can AC run continuously?

If you are wondering how long to run an AC in a day, then you can run it as long as you want constantly throughout the day for 24 hours. There is no harm in doing so and it is designed to keep your room cool for the entire day.