My central ac just quit on me. Im wondering how I can do some initial
troubleshooting. Im curious because it's not blowing anything, and
when I turn the thermistat there is no 'click' like usual...as if it's
trying to work. I've checked the fuse box and it's not tripped (reset
anyway). The unit is on the roof, so when I get up there, what should
I check for?