My Carrier AC stopped working several days ago. I could hear a light humming from the outside unite, but would not kick on. By the way, the last few years I have had to use a screwdriver to spin the blades to "kick start the season". That no longer works. So I replaced the capacitor and fan motor. Now, I do not hear any humming OR spinning. Whats my next troubleshoot? or any thoughts on wiring I may have botched? This is my first time trying to fix AC on my own.