Garage door will not go down unless I hold bell button in. Model #13953674srt1.

B B Garage door EXPERT October 10, 2009

Your door opener will not work without operating sensors. By holding down the wall button you are bypassing this safety measure.

Lets try hooking them up with a dummy wire to see if they are good. Cut the bell wire 12" from the sensors and strip the wire 7/16" from the end. The wires are white and colored/white, probably black. Hook these two wires up to the opener head. If you have the push in type hook ups then it is the 3 and 4 or black and white. Colored or black to black and white ti white. Hook both of them up and point them at each other. If they both light up then they are good and I would run new bell wire just in case and reattach them to the bottom of the door. If they do not light up then you need new sensors. You can go to searspartsdirect.com for replacements, or your local sears store. But your sensors have to be on to work right. If you do not have a surge protector on the unit get one. These types of problems mostly occur because the unit was not protected. THanks BB