Unit wasn't working, shut off and is now working, but wants system checked regardless. Ac tune up. Thermostat within 2°.Filter clean, No ice on txv coil, no water in overflow pan. Drain line clear and draining. Chemically cleaned outdoor ac unit. Test of mechanical components finds them all within their normal ranges. Freon levels perfect. Cleaned and tightened txv in attic. All okaybat this time.