Here are a few tips and tricks for maintaining and troubleshooting air conditioning systems:

Keep the air filter clean: A dirty air filter can block airflow and reduce the efficiency of the system. Check and replace the air filter every month or as needed.
Keep the outdoor unit free of debris: Make sure to keep the area around the outdoor unit clear of leaves, grass clippings, and other debris.
Check for leaks: Look for signs of refrigerant leaks, such as hissing noises or frost on the pipes. If you suspect a leak, call a professional for repair.
Use a programmable thermostat: A programmable thermostat can help you save energy by automatically adjusting the temperature when you’re away or asleep.
Keep the coils clean: Dirty coils can cause the system to work harder and reduce its efficiency. Clean the coils at least once a year, or as needed.
Schedule regular maintenance: Have a professional service the system at least once a year to catch and fix any issues before they become major problems.
Check the airflow: If the airflow is weak, it could be a sign of a problem with the system. Check for blockages in the ducts or registers and make sure the vents are open.