Arrived to do performance maintenance. Turned on air conditioning system at the thermostat. Started inspection at the furnace. Measured power consumption and measured the temperature split. Flushed condensation drain line. Checked blower to see if there is any play in the bearings. Checked system air filter and with homeowners approval installed a new one. Moved inspection outside and checked the coil for cleanliness and excessive vibration. Found that the coil was heavily coated in dust and debris. Measured power consumption of the compressor and condenser fan motors. Verified operation of all mechanical and electronic components. Verified system refrigerant charge. With homeowners approval performed an extensive coil cleaning. Air conditioning system is functioning properly at this time. View visual findings from this job here - https://visionshare.xoi.io/?id=XA-D392-193D9837CDE24CDD8A8BFCC70A2CEDF5