Arrived for ac check today. Started at furnace and tested static pressure, it is passing. Motor amps are good. Blower wheel is good. The filter was very dirty, I replaced it with one of yours. The temp split was at 14 degrees. At the condensing unit the coil was caked in dirt, I cleaned it. I found one of the schraders was leaking, and the refrigerant was low. I replaced schrader and added refrigerant to make correct. Temp split is now 19-20 degrees. Compressor and fan amps are good. Capacitor tested good. System is running upon departure. Thanks for choosing LBA.