The answer to how to maintain an AC unit is to regularly clean and inspect the system. This includes cleaning the outdoor condenser unit, changing the air filter, and inspecting the indoor components. Proper maintenance can help extend the life of your AC system and ensure it runs efficiently.
Start by turning off the power to the unit and removing any debris or obstructions around the outdoor condenser. Use a garden hose to gently spray down the coils, being careful not to bend the fins. Check the air filter monthly and replace it when it looks dirty. The indoor air handler and ductwork should also be inspected periodically for any issues.