Upon arrival customer told me the home inspector said there was no ac coming out the vent and the compressor is making a loud noise. Turned unit on and we have a 18.4 delta T. We are in are range of 18 to 23. I put my gauges on and are Freon levels are good there is no leak. The noise is not the compressor it is the fan spinning. There is nothing wrong with the a. U it.