I have a amana central air with heat pump. When I put my thermostat on the auto and cool position my outside unit and inside blower does not come on. But when I put the thermostat on the on position inside blower works but not tne outside unit. The heater side works great . I have replaced the thermostat and the outside unit I replaced the contactor and the small capacitor and still same problem , what else can cause the outside fan and compressor plus the inside blower fan not to work.