Why isn’t my split system air conditioning unit blowing cold air?

Compare Your Air Group > Blog > FAQ > Why isn’t my split system air conditioning unit blowing cold air?

If your split system isn’t providing any cool air, a number of issues may have occurred:

  • Air Filters

The most common issue is a lack of adequate airflow. You may have an air filter that is dirty or clogged, preventing airflow over the evaporator coils, which will result in a decrease in cold air. To rectify, clean, or replace with soapy water and a soft brush or replace it.

  • Fan or Fan Motor

You may find that the circulating fan is not running, restricting the air flow. Check to see if the fan turns smoothly and ensure the blades are not damaged. In a situation where the motor has seized, it will need to be replaced. 

  • Temperature Control

The temperature control, which has a sensing bulb that monitors the room air temperature, may not be functional. It is best to have a professional inspect this issue.

  • Electronic Control Board

There may be an issue with the Control Board (also known as the PCB), which monitors the incoming air temperature. If defective, power may not be going to the compressor, which means there will be no cooling.

  • Capacitor or Thermistor

These two components are found on electronic control models near the evaporator coil. You will once again need a professional to inspect and replace them if they are causing the issue.

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