American Standard outdoor unit runs continuously and rarely shuts off

Safety first: Turn off power before cleaning coils.

• Check thermostat setting: Set the thermostat to a reasonable temperature (e.g., 75–78°F) and allow time for the home to cool.
• Replace filter and clean coils: Ensure maximum airflow and heat transfer by installing a clean filter and cleaning both indoor and outdoor coils.
• Check for air leaks: Seal obvious gaps around doors, windows, and duct connections to reduce load.
• Professional evaluation: If the unit still runs nonstop and cannot reach setpoint, a technician should check system capacity, refrigerant charge, and duct design.