If your window air conditioner is blowing hot air, it may be an indication of low refrigerant levels (coolant) or other issues with the unit. Adding refrigerant to an air conditioner requires specialized tools and knowledge, and it's not recommended for untrained individuals to attempt this task. Handling refrigerant without proper training and equipment can be hazardous and may lead to injury or damage to the unit.
Instead of attempting to add refrigerant yourself, I recommend following these steps to troubleshoot and potentially resolve the issue:
Check the air filter: A dirty or clogged air filter can restrict airflow and affect the cooling performance of the air conditioner. Remove the air filter, clean it, or replace it if it's too dirty.
Verify the thermostat settings: Make sure the thermostat is set to the cooling mode and the temperature is set lower than the current room temperature.
Clean the condenser coils: Dust and debris can accumulate on the condenser coils, reducing the air conditioner's efficiency. Turn off the unit, remove any visible debris, and gently clean the coils using a soft brush or vacuum cleaner.
Ensure proper installation: Verify that the window air conditioner is correctly installed and sealed in the window frame. Gaps or leaks around the unit can allow hot air to enter the room.
Check for any obstructions: Ensure there are no obstructions blocking the air intake or air outlet vents of the air conditioner.
If you've tried these troubleshooting steps and the air conditioner is still blowing hot air, it's best to contact a professional HVAC technician or the manufacturer's authorized service center to diagnose and repair the issue. They have the expertise and tools required to handle refrigerant and can properly address any problems with the cooling system. Attempting to add refrigerant without proper knowledge and equipment may lead to further damage and can void the warranty of the unit.