No cooling, system running upon arrival, however, compressor is rattling very loud and not pumping refrigerant. Then compressor shut off on overload. Got compressor to cool down and compressor started up. OK however start up amps were very high. Also static pressure very high on system, even with lower merv filter in it. Cold air return is undersized. Need to change 16 inch flex to 18 inch flex and 9 inch flex 10 inch flex. Also recommended replacing compressor. Compressor still under parts warranty. System was never registered by company who installed it so there is only a five year parts warranty. System is running and operating at this time, however, it will go out again. Client is going to try to have company who installed system to come back and fix return and make other repairs.