Hello I cleaned the Condeser Coils with the foam cleaner and hosed it off. Also replaced starting capacitor and 30 amp panel breaker in main breaker panel inside house. See detail and pics in link below. https://www.hearth.com/talk/threads/...r-buzzing-after-the-coil-cleaning-help.88931/ Now, I picked up a can of the old evapakleen! See pic 1 This old Lenox seems different. It is located in the attic. The return air comes into the right side into the top of the A part of the A Coil which is lying on it's side! So the base of the A coil is where the Evaporator Fan is located! See pic 2-5 1st Question Is this the normal configuration? Is it the best configuration? So I ran the shop vac over everything gently and then sprayed the evapakleen all over it. See pic 6 Then put it back together and used foil tape to fix a few leaks in ducting around the attic. 2nd Question How can I tell if the evaporator fan is weak and not blowing enough air? The motor shaft is real rusty looking! The air does feel a little cooler coming out now. It still takes time to cool the house down but everything is running and working.