craftsman garage door opener - no signal

roberto_1June 5, 2006

I have a Sears Craftsman garage door opener model 139.18778 with a 3-button transmitter. Recently I tried to re-program an old transmitter that a friend gave me and I messed up the whole thing. I managed to find the instruction manual and reset the dipswitches and the opener now works but the problem is that I can't get a signal. To get it to work, I have to hold the transmitter up to the opener or get it to touch the antenna then it works, as soon as I move away from the receiver, nothing happens. Anyone out there have any ideas of the problem.

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The dip switches have 3 positions. They are +, 0, and -. Or up, middle and down. Make sure the switches match exactly on the receiver and the remote.

    Bookmark   June 5, 2006 at 6:55PM
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i am not sure my last message got posted since i am new at this
i need to know what are the number on the table for that model 139.18778 with dip switch
thank you

    Bookmark   June 26, 2006 at 12:15AM
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You lost me. What do you mean "number on the table?"

    Bookmark   June 26, 2006 at 12:20PM
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