1. Check the Thermostat

• Make sure it’s set to “Cool” mode.
• Lower the temperature setting to see if cooling starts.
• Replace the batteries if applicable.

2. Inspect the Air Filter

• A clogged filter can restrict airflow and freeze the coils.
• Replace or clean the filter if it appears dirty.

3. Check for a Frozen Evaporator Coil

• Turn off the AC and let the coil thaw.
• Ensure vents are open and the filter is clean to prevent future freezing.

4. Examine the Outdoor Unit (Condenser)

• Remove dirt, leaves, or debris blocking airflow.
• Check if the fan is running; if not, it may be a motor or capacitor issue.

5. Inspect the Refrigerant Levels

• Low refrigerant levels (due to a leak) prevent cooling.
• A professional should handle refrigerant issues.

6. Check the Circuit Breaker

• Reset it if it has tripped.
• Frequent tripping could indicate an electrical issue.

7. Test the Compressor

• If the compressor isn’t running, it may need professional repair.

8. Look for Ductwork Issues

• Leaks or blockages in ducts can prevent cool air from reaching rooms.
• Seal any visible gaps or call a technician.

When to Call a Professional

If these steps don’t resolve the issue, a licensed HVAC technician can help with:
✅ Refrigerant leaks
✅ Electrical or wiring problems
✅ Compressor failure
✅ Major repairs