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Question About Craftsman Garage Door Opener 139.53978SRT
the power goes on and off and when its off and I s...

the power goes on and off and when its off and I slap the unit the power comes back and then when I pres the button it goes and cuts off, I think its a short what do you think?

Asked by Lou Cattaruzza on 04/01/2015 1  Answer

ManualsOnline posted an answer 9 years, 6 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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