ok what i was told is there is some modular that isnt good. can it be the relay switch. Have put 200.00 in and they still dont work.....cant trust anyone
i havent pulled 1 apart in a while, but they have a cam inside of them to run through an up and down cycle, if it still is recieving power at the end of the cycle, it repeats.either a it cycles and shuts off, or b the cam stop is worn out.