Check the evaporator coil. The evaporator coil is located inside the air handler, and it absorbs heat from the air that passes through it. If the evaporator coil is dirty, it will not be able to absorb heat as efficiently, which will cause the AC to blow warm air. Clean the evaporator coil according to the manufacturer's instructions.
Check the refrigerant level. If the refrigerant level is too low, the AC will not be able to cool the air as effectively. Have a certified HVAC technician check the refrigerant level and add more refrigerant if necessary.
Check the compressor. The compressor is the heart of the AC system, and it circulates the refrigerant. If the compressor is not working properly, the AC will not be able to cool the air. Have a certified HVAC technician check the compressor.
Check the thermostat. The thermostat controls the temperature of the AC. If the thermostat is not set correctly, the AC will not be able to cool the air to the desired temperature. Check the thermostat and make sure it is set to the correct temperature.
Check the ductwork. If the ductwork is leaking or blocked, it can prevent the cooled air from reaching the rooms in your home. Have a certified HVAC technician check the ductwork and repair any leaks or blockages.
