Upon my arrival I spoke to the customer about their concerns with the main side of the homes system not cooling well. Performing my diagnostics I found the system to be low on refrigerant which led to me performing a leak search. On the indoor system I found a leak with my electronic leak detector and the outdoor system I found traces of oil on the outdoor coil and found the leak using soap bubbles. I spoke to the customer about my concerns and he chose a repair for both Heat transfer media coils and signed his 2 systems up for maintenance.