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Question About Craftsman Garage Door Opener 139.53978SRT
My light used to come on when I broke the beam but...

My light used to come on when I broke the beam but it no longer does, even though breaking the beam caused the door to reverse & open. How do I get the light to come on by breaking the beam when the door is open & has gone out?

Asked by Bob on 04/03/2013 1  Answer

ManualsOnline posted an answer 11 years, 7 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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