AC tuneup on to 2005 air-conditioning systems. Upstairs: the system is it in good condition slight dust buildup on the blower wheel. This could cause health concerns. AC capacitor on outdoor unit is starting to show week at a 4% drop. Also contactor on outdoor unit is starting to show burn marks. Basement. This system is in pretty good condition appears to be a newer furnace. Static pressure is slightly high, this is due to a undersized return duct. Outdoor condenser is starting to show oil on the condenser fan motor. All other electrical components are operating properly at this time