Sparkchaser.77306
New Member
Hello! I have a garage door opener that I would like to repair. I am posting here because it seems to have a Synchronous-Reversible AC Motor. It runs ok but usually will not start in either direction. What got me to post this is there is a black capacitor, with two poles, that when idle both have 120VAC on the terminals, When running there is 117 VAC on one terminal and almost 0 VAC on the other. One person told me it was just a start capacitor. To my thinking if it was taken out of the circuit the voltage to it would be switched off and both poles would be dead or the switch would be after the cap and both would still be hot. Ok what am I missing here ?? Oh and if you turn it to close the contacts close and it runs in the closed direction until it hits the ens and stops and then immediately runs the other direction until it stops. So it seems the directional control is lost ... I replaced the cap a while back ... I got as close as I could find on size ...
Any help here would be appreciated! Thanks and God bless! Joe
P. S. if there is 120 VAC on the hot terminal should I not be able to hook up a incandescent drop light to the terminal loosing power and ground and be able to see if the cap will conduct?
Any help here would be appreciated! Thanks and God bless! Joe
P. S. if there is 120 VAC on the hot terminal should I not be able to hook up a incandescent drop light to the terminal loosing power and ground and be able to see if the cap will conduct?