Once the Z starting to over heat the AC will start to get warmer. Here how to check a bad fan clutch. When you step on the gas pedal and you hear a loud wooooing sound and then you let off the gas pedal n it stop that mean your fan clutch is staying engage and need to change before the fan break. It happened to me and chip my custom paint from under the hood n poke a hole in my radiator. Get new one from Z1 or CZP not off ebay or auto parts store.