I preformed an AC tune up today. I found that the coil was causing static pressure issues due to it being very dirty and in need of cleaning. The filter is also very dirty and causing static pressure issues the land lord said they had some filters and would come out and change it. The condenser outside has a bad capacitor reading 12% out of its range. Along with this the compressor is amping high at start up, this is likely what has mad the capacitor go bad. The contactor also has burning and pitting on it that will cause improper connection, it should be replaced. The system is 22 years old, i suggested looking at the price of repairs and the cost of a new system they decided to get a new system and said they would likely call us back towards the end of the summer for a system replacement. The AC was running when i left.