toller wrote:
About a month ago my Liftmaster 1265 stopped running. It would just hum for
about 2 seconds and stop. Liftmaster said the limit switch has been
overrun, so I played with that. When I move the limit back, the opener
hummed for 2 seconds, paused, and then hummed for 2 seconds with a slightly
different pitch.

Someone here said the problem was probably a leaking capacitor. I took the
cover off, but the capacitor looked fine. But when I touched the capacitor
the opener suddenly started running. It was okay for 2 days, then stopped
again. I touched the capacitor again and it ran okay for 5 minutes, then
stopped. Now touching does not help.

I figured there was loose wire, but I sure can't find one. Liftmaster says
it is probably a bad capacitor for $20; and if not that, a bad logic board
for $85.

Does a bad capacitor make sense? Could touching a bad capacitor make it run
for a while? Obviously they won't be taking the capacitor back if it
doesn't help.

This is so so frustrating.


Hi,
How is the capacitor mounted? On the body of motor? On a logic board?
Any lead wires from capacitor? Then where is the wires going?
No wires and mounted on a logic board, then vibration cracked solder
joints causing intermittent problem. Resolder them and reinforce it with
a drop of epoxy.
Good luck,
Tony
P.S. You can't tell whether capacitor is good or bad by just looking.