We have a York Air Condenser that is approximately 15 years old. This evening, the condenser was running so hard and the fan was turning so fast that we could hear it inside our home. Upon closer inspection, it looked (and sounded) like a turbine engine that was about to launch a C-130. I turned off the HVAC system and it eventually stopped (although it did take a few minutes). Any ideas as to what could be going on? Is our condenser on its last leg?? :confused: