Complete 1 system a/c repair and preventative maintenance check. Find system very dirty and lot of drywall dust, Find system have rat poops inside and outside of the system, rat got into the system from broken supply duct run. Find the filter very dirty. Find ac unit operating with stress compressor, high amp/worn condenser fan motor and pitted contactor. Need to remove rats out of crawlspace and system, repair duct run and need to insulate duct wrap from water damage. Need duct cleaning with a fogger to sanitize the duct system.