I just purchase a 53960 1/2 hp opener to replace the 1/2 hp Chamberlain I had... Installation was very simple as all I needed to do was swap drives... I am unable to get the door to run through a complete cycle... All I can get it to do is move about one foot up or down... I have maxed the travel adjustment, maxed the force adjustment to no avail... any and all assistance greatly appreciated...
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