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why does garage door go back up

Hi Marie. the 1/3 hp Stanleys of older vintage have 2 adjustment screws on the side of the unit. One is sensitivity and one is the travel adjustment. Look for two small pencil size holes on the side of the motor housing. It sounds like your door is traveling far enough but the
set point needs adjustment. You will see an arrow pointing in the + direction. You will also see a - at the other end of the arrow. You need to get a ladder and small screw driver. Turn the sensitivity adjustment screw in 1/4 increments in the + direction then try closing the door each 1/4 adjustment. When the door stays down. stop. This screw prevents the door from closing with too much force and possibly injuring a child or infant. It can however be set too sensitive and I believe this is your problem. Once the door stays down place a object under the doorway and close the door, when the garage door hits the object it should reverse letting you know you have the correct adjustment to keep the door from injuring a child.

If the door does not reverse then back off the sensitivity about an 1/8 of a turn in the - direction. Then retest. You may also have to tinker with the travel adjustment but I betting the sensitivity will do the trick. One bit of heads up advice. if you cycle the door too many times in a short period the thermal overload will shut the motor off. You will need to wait approx. 10 minutes for it to cool down and reset itself. The problem is probably the opener safety sensors. Inspect the photo-eye sensor. The sensors are the small black boxes the near the bottom of your garage door frame which are usually installed on the tracks with a small bracket. When the infra-red sensors are malfunctioning, usually one of the sensor lights will be blinking.

The problem is either due to a blocked path between the sensors, dirty eyes, loose wires at the sensors or at the motor head, or just bad sensors. The transmitters (remotes) will not work to close the garage door. You will find that the door will only move an inch or so in the close direction and reverse. When this happens your garage door will only close by holding down on the wall button, or wall console, until the door fully closes. This method is the only way to override the safety and close the door. 1. Make sure that there is not something blocking the sensors from communicating with each other and the wire connections are securely fastened at the sensors and motor head, and the eyes are directed at each other. A lot of the time dust, spiderwebs, or even a small toy can block the sensors.

If there is anything blocking the sensor remove it and try your door again. 2. If there is nothing blocking the sensors they maybe misaligned. They need to be pointed at each other in-order for they to work. If they are try to push alignment sensor into alignment. You will know they are aligned when the light stops blinking on the sensor. 3. Also, try unplugging the garage door opener and re-plugging the unit back into the outlet. This acts as a reset and may reset the sensors. If nothing works, it may be that you have to replace the sensors. Still Havng Trouble? We will come to your house and diaganose the problem for you just give us a call! American Service Center Garage Door Solutions can be reached at 972-681-2222 for any issues in the Dallas / Fort Worth and surrounding areas!

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