human
How do I know when it's time to replace my air conditioning unit?
assistant
It is recommended that you have your air conditioner serviced every two years, or more often if you are in a particularly hot and humid climate. If the air conditioner has been running for long periods of time without being serviced, you should consider replacing it sooner rather than later. You can also check for signs such as loud noises coming from the unit, decreased airflow, and an increase in energy bills.