I need help understanding what to do to troubleshoot the flashing light on the wall control unit. This is a Craftsman 1/2 hp chain drive about 6 7 years old. No owners manual, came with house.
The remotes do not work and the wall light is flashing. I've checked to ensure photo cells are clear of obstruction, appear to be alighned properly, cleaned the lens, reset power.
The door does go up & down from the wall control.
Don't have a clue what to do next. Don't know how to get the owners manual either. Please Help Bob!!
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