Only system not cooling. Homeowners had switched the thermostats to the off position before my arrival. At the outdoor unit I tested the compressor windings and capacitor. The run winding was reading at .46, which is very low and neither the compressor or fan would come on. I brought the homeowners out to show them my observations and powered the system back on and the compressor fired up but the contactor was sparking. At the furnace I observed that the heat exchanger has a couple cracks and the evaporator coil is rusting. Also the blower wheel is impacted with debris and restricting air flow. The homeowner requested I scheduled a install supervisor to come out after the holiday and also replace the contactor as a bandaid fix. Thank you for choosing T.E. Certified, have a great day!