I have central air again. The part Lawnchair thought he needed still didn't show up in the mail. Doing some research, he found a industrial supply store that had parts. Which didn't have the capacitor in stock, but was willing to offer advice. Which was that the fan was bad. And thus sold us a fan that would work, plus a capacitor for just the fan. Whee. I seem to have caught another cold, so I hid in the bath tub. But now the calming cool air is blowing. And I have had the first of the garden melon.