Why Isn’t My Air Conditioner Cooling?


Good news, our gorgeous Charleston summers are right around the corner! With the approach of summer, your air conditioner will be used more frequently. If your air conditioner hasn’t been used since last summer, make sure you are home the first time it is turned on to make sure it is running properly. If you discover that your air conditioner isn’t cooling your home, it is not only an unpleasant surprise, but can cause you to be concerned about the cost of repairs.

The good news is there are several causes for a non-cooling air conditioner that aren’t costly repairs.

Check Your Thermostat Setting

Your thermostat is the control center for your entire HVAC system. When you switch your thermostat from the heat to the cool setting, it will remember the last time it was set to cool and the temperature it was set for. If it doesn’t feel cool enough in your home, try adjusting the temperature until it is at a comfortable setting.

Also, it is important to pay attention if the fan is set to On or Auto. When you have the fan set to the On setting, it constantly runs the fan but it doesn’t mean it will provide a constant flow of cold air. This means the airflow will feel lukewarm when the compressor is turned off and the refrigerant isn’t moving through the system. By changing the fan to the Auto setting, it will only run when the compressor is moving refrigerant through and cooling your home.

Is the Refrigerant Level Low?

If your refrigerant level is low it can also cause an air conditioner to not cool the air. Refrigerant transfers warm air from your home to outside at the condenser coil. If there is an insufficient amount of refrigerant, such as Freon, it will prevent the air conditioner from transferring the heat, which will leave the airflow too warm.

If you suspect a low refrigerant level in your HVAC unit, more needs to be added to replace any that was lost. This seems like it would be an easy DIY project; however, adding refrigerant requires specific skill and knowledge to make sure it is done correct.

A Dirty Evaporator or Condenser Coil

Dirt and debris stuck in the evaporator or condenser coil can cause your air conditioner from providing enough cool air. These two important parts of your HVAC system are responsible for exchanging the heat, so if they are clogged with dust, dirt, cobwebs, or lint it will prevent them from functioning efficiently.

This is a fairly simple fix and can be used with a wet/dry vacuum cleaner to remove the dirt and debris. You can also apply an approved coil-cleaning solution that can be found in most home improvement stores. Make sure to follow the directions on the bottle and rinse the coils after the solution has soaked and the leftover debris is removed. And always disconnect the electrical power when working on your HVAC unit.

Make sure you have your air conditioner inspected yearly, especially prior to the hot summer months when it will be used the most. By signing up for one of our HVAC maintenance plans, it will ensure your system is inspected regularly. Contact us today for all of your heating and air conditioning needs!