On arrival system running and heating producing 20 degrees delta. Indoor unit very dirty. Dust fully bypassing filter, leading to a very dirty coil and blower. This impacts efficiency by reducing airflow. Additionally biological growth was present in both blower compartment and supply plenum. Recommended an April aire upgrade kit to install filters that will no longer bypass dust, an iaq 200 uvc system to kill biological growth spores in airflow, and a level two duct cleaning which will clean up all the construction dust along with cleaning the blower, coil, and spraying an anti fungal and microbial spray through the ducts and system. Outdoor unit was overamping on start up pulling 122 amps, exceeding the red line of 112. Additionally the contactor was buzzing and pitted. Recommended replacing contactor and adding a compressor saver kit to prevent overamping and overall help the compressor start easier. Discussed with customer over phone, will call to follow up Monday.