SYSTEM NOT HEATING/ COOLING PROPERLY. TESTED SYSTEM AND FOUND WET SWITCH INTERMITTENTLY FAILING CAUSING SYSTEM TO NOT COOL. ALSO FOUND DAMPER MOTOR NOT OPENING OR CLOSINCE COMPLETELY. ALSO FOUND BLOWER WHEEL DIRTY. CHECKED COMPONENTS AND REFRIGERANT PRESSURES. FOUND THE COND. COILS DIRTY. TODAYNWE COMPLETED IMMEDIATE REPAIRS INCLUDING REPLACING DAMPER MOTOR FOR UPSTAIRS ZONE, REPLACING FLOAT SWITCH WITH WET SWITCH, AND CLEANING COND. COILS. ALSO CUSTOMER SIGNED UP FOR HOMECARE MAINTENANCE PLAN.