Upon arrival customer mentioned system wasnt cooling properly intermittently. Found fan left continously on at thermostat which was why equipment in attic wouldn't turn off. System started up cooling without issues. Checked operating refrigerant pressures. Verified zoning response and damper motors are opening properly. Tested power distribution system and corresponding starting components. Compressor pulling somewhat high amperage during start up. Start assist kit is recommended to alleviate excessive amperage. Otherwise system was found to be fully operational at this time. Unwired zoning motors to eliminate variables per customer request. Suspect low pressure switch intermittently was tripping due too improperly zoned single stage system. Recommend replacing filters to reduce airflow restrictions.