12 year old house and AC, separate system for main level is working properly (blowing ~45F air), upstairs system appears to have been working properly until this week. It may have been a gradual decline but it became obvious recently that the system blower would be on for longer periods, to the point where it can no longer cool upstairs below 75 or so. Air coming out of the vents is around 65F. This system resides in my attic where the temps are above 120F even on a modest day like today (low 80s and sunny), but it worked without problems until this year. Observations: Systems triggers on and off properly once desired temperature on thermostat is reached. Panel filter is new. Fan in condenser outside kicks on when systems starts, air coming out isn't really warmer than ambient. The properly functioning system for the main level is blowing out much warmer air. Coolant line definitely gets cold but it doesn't stay that way for long. Not as cold as the other system. System details: Amana 80SSE furnace with CCF24FCC evaporator (?) in attic. Any ideas on what I can look into? Does the fact that it works marginally suggest low freon? I am moving in the next few months so am not too keen to swap out a lot of parts. Thanks.

My outside AC fan is not spinning and just emits a continuous buzzing or humming electrical sound. I tried giving it a spin with a stick in either direction, and the fan spins easily and freely, but it still doesn't kick on. Could this be a bad capacitor, contactor, something else? The model is a Trane XE1200. Any help is appreciated. Thanks.