Air Conditioner Not Cooling? 7 Potential Causes (and Fixes)

Ensure your thermostat is set to the desired temperature and the fan setting is "On" to check for proper functionality. Refer to the owner's manual for guidance if needed.

Improperly Set Thermostat: 

If the thermostat is set correctly but not communicating with the HVAC unit, it may be broken, especially in older models. Consider replacing it, possibly with a smart thermostat for enhanced control.

Broken Thermostat: 

Replace the return filter regularly to prevent dirt and debris buildup, which can hinder proper cooling. Frequency of replacement varies based on factors like pets in the home.

Dirty Return Filter: 

Clean the condenser coils on the outside unit to ensure efficient heat dissipation and optimal cooling performance.

Dirty Condenser Coil:

Check for signs of a frozen evaporator coil, such as excess condensation or frost buildup. Turn off the unit to defrost, and if the issue persists, seek professional help.

Frozen Evaporator Coil: 

A refrigerant leak can significantly impact cooling efficiency. Professional intervention is necessary to address refrigerant levels and leaks.

Low Refrigerant: 

If the air conditioner struggles to cool during peak periods, it may be undersized for the home. Consider upgrading to a properly sized unit to ensure adequate cooling capacity.

Undersized Unit: