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Question About Craftsman Garage Door Opener 139.53978SRT
I hit the button door goes half way down and then ...

I hit the button door goes half way down and then it goes up the sensors are clear been having trouble for about a week turn unit off clean the inside gheck connections work fine for a week then it started again

Asked by dan on 11/23/2013 1  Answer

ManualsOnline posted an answer 11 years, 1 month 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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