My garage door opener stopped working; it just hummed for about 2 seconds. For no particular reason I touched the starting capacitor and fixed it. It ran okay for a couple days, then stopped. I touched it again and it ran twice before breaking. Now my magic touch fails completely. (I can't find any loose wires) The manufacturer's best guess is that the capacitor is bad.
It takes a 53-64 mfd 220vac 30b0363 Fujitsu Towa no. gk-861) Any way to varify the capacitor is bad before replacing it? I put an ohm meter across it, and it shows an open circuit, but since I have never tested a good capacitor I don't know how much that proves. 2) The manufacturer wants $20 for a replacement. Am I likely to find one cheaper locally? Where, an electrical distributor? 3) There are two red wires going to one contact and two blues going to the other. Is a capacitor symetrical, so if I got my contacts backwards it would be okay?