Ac club service getting a 18 degree delta t. Filter is clean. Checked condesate drain and did not detect any clogs. Checked uv light and it is still working. Tighten all screws and eletrical connections. Checked blower, evaporator, and pan all are clean. Checked blower voltage enhancement system and it read within factory spec of 15uf. Checked duct work and there is no debris. Checked outdoor system coil is clean Voltage enhancement system read within factory spec. Voltage gateway haves no pitting. Operation normal at this time