If your air conditioner is no longer cooling properly, it could be due to a number of reasons. Here are some steps you can take to try to resolve the problem:
1. **Check the air filter**: A dirty or clogged air filter can impede airflow and reduce the efficiency of your air conditioner. Be sure to clean or replace the filter if necessary.
2. **Check the ventilation grills**: Make sure that the interior and exterior ventilation grills are not obstructed by furniture, plants or other objects that could block the airflow.
3. **Check thermostat settings**: Make sure the thermostat is set to the correct temperature and cooling mode.
4. **Check air conditioner settings**: Make sure the air conditioner settings are correct, including fan speed and air direction settings.
5. **Check the outdoor condenser**: Make sure the outdoor condenser is not clogged with debris such as leaves, grass or debris. Clean the condenser if necessary.
6. **Check the refrigerant level**: A low refrigerant level may indicate a leak in the air conditioning system.
