BTW, I have a follow up question.
I am buying a
AO Smith DL1056 1/2 HP Direct Drive Blower Motor
motor, which needs a 10 mF capacitor (according to manufacturer's
specs),
but the AC guy put in a 7.5 mF cap.
Any reasons why he would do that other than that's what he had
available (because he had to make a special run to grainger anyway?