1. Turn Off Power to the Unit

     Switch off the window AC and unplug it from the power outlet. It’s also a good idea to turn off the breaker if possible to ensure safety.

2. Remove the Front Panel and Air Conditioner

          Remove the front panel of the window AC to access the air filter. Some units might have clips instead of screws. Check the Air Filter: If the filter is dirty, clean it by vacuuming it with a brush attachment or washing it with warm soapy water. If the filter is damaged, replace it with a new one.

3. Clean the Evaporator Coil

  • Tool Needed: Soft brush, coil cleaner (optional), water, microfiber cloth
  •  Once the filter is removed, use a soft brush to remove any dust or debris from the evaporator coil inside the AC.
  • If necessary, apply a coil cleaner spray to loosen dirt or grime. Let it sit for a few minutes and then wipe it down with a microfiber cloth. Be careful not to damage the coil.

4. Clean the Condenser Coil

  • Tool Needed: Soft brush, vacuum, air blower, water
  •  The condenser coil is located in the rear section of the window AC, often exposed to outdoor air. Clean the exterior of the condenser coil with a vacuum or air blower to remove dirt, leaves, or other debris.
  • If necessary, spray the coil with a coil cleaner solution, then rinse with water (if the unit is safe for water exposure). Let it dry thoroughly.

5. Straighten the Fins

          The evaporator and condenser coils have delicate fins that can get bent. My service expert Use a fin comb to gently straighten any bent fins to improve airflow and efficiency.

6. Check and Clear the Condensate Drain

        : The condensate drain removes moisture from the system. Ensure the drain is not blocked by using a wet/dry vacuum to suck out debris or dust. Flush the drain with a mixture of water and mild detergent to remove any algae or mold buildup. This will help prevent any water-related issues.

7. Inspect and Clean the Fan Blades

           Inspect the fan blades for dirt or debris. Use a vacuum with a brush attachment to clean the blades gently. If needed, use a soft cloth to wipe the blades clean.

8. Check for Refrigerant Leaks

           If the AC is not cooling properly, the refrigerant might be low. Inspect the unit for any signs of leakage or unusual performance. If you suspect low refrigerant, then my service technician  it’s best to call a professional technician to check and refill the refrigerant, as this requires special tools and certification.

9. Inspect the Electrical Components

        Check the electrical connections, such as wires, for any signs of wear or corrosion. If you are comfortable, you can use a voltage tester to ensure the unit is safely powered off. Tighten any loose screws or connections. If any wires or components appear damaged, they may need replacement.

10. Check and Clean the Exterior of the Unit

        Clean the exterior housing of the AC unit with a damp cloth and mild detergent. This keeps the unit looking neat and prevents dirt buildup on the outside.

11. Reassemble the AC Unit

       Once all the parts have been cleaned and checked, reassemble the front panel, air filter, and all connections, stablizer if available.

12. Test the Unit

  Plug the unit back in and turn it on. Test the cooling function and listen for any unusual sounds. Check if the airflow is strong and if it’s cooling efficiently.

Spare Parts You Might Need:

  • Replacement Air Filters: If the current filter is too dirty or damaged.
  • Coil Cleaner: If there is significant buildup on the evaporator or condenser coils.
  • New Fan Motor: If the fan is not working properly.
  • Refrigerant: If the refrigerant level is low, though this requires a professional technician.
  • Fins: If the fins are severely bent and cannot be straightened with a fin comb, consider replacing the coils or fins.