Checked all operations in the cooling mode and inspected the furnace filter. Checked the static pressure and found it was failing. Checked all electrical and refrigerant components in the system. Today we found that the system was low on R-22, the blower was dirty, the fan motor was leaking oil, the contactor was getting burnt, and the heat exchanger had lots of heat stress. Talked with customer about the concerns and before making any repairs they wanted to look at replacement options. A supervisor is out evaluating static and looking at replacement.