allister 3000 garage door sensitivity control

The door will only operate when holding down the button at the house. The remote, or single touch of the fixed control button will make the light on the control unit light up and the door will move less that 1 inch.
The door is used only 2-3 days per week and has been installed for over 10 years. I highly doubt that the door is out of balance.
In other posts there has been mention of sensitivity control. Where can I adjust the sensitivity if necessary?
Thank you
Jack
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On 9/14/2013 12:44 PM, jackie wrote:

There is usually a control for adjusting the sensitivity of the circuitry that senses the current draw of the opener's motor. As you know it's part of the safety built into the door opener for those cases when a child or goofy adult gets under a closing door or when something may get caught in an opening door and cause damage. You should pull the emergency release cord and make sure the door opens smoothly by hand and with the door manually opened all the way, see if the opener moves the mechanical parts if it's a chain drive or screw drive which will help you determine if there is a drive mechanism problem. There should be a knob or hole with a screw slot for adjusting the sensitivity of the current limit for the motor. The potentiometer could simply have some dust in it or there could be dried grease on the drive mechanism which would cause the motor to draw enough current to shut it down. ^_^
TDD
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jackie wrote:

sensitive the door sense the blockage when moving up/down so it can stop or reverse direction of movement.
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