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gzkqht

08:19AM | 01/27/07
Member Since: 01/26/07
2 lifetime posts
Bvwindows
Craftsman 1/2HP model#139.53753 garage door opener left safety sensor appers to not work. The indicator light on the left is not on and the right side is amber. No matter what adjustments or allingments I make to it the garage door will not operate correctly. I have verified that there is not any obstruction in the path of the 2 safety sensors. The remotes, keypad and wall switch all yeild the same result which is a click followed by the unit light blinking 10 times, but no door action. If I hold the wall mount switch down the door will close and open, but I have to hold the button until the door is closed all the way. Is there anway to bypass the saftey sensors so I can verify that they are indeed the problem before replacing them? Please Help.

Billhart

10:24AM | 01/27/07
Member Since: 04/25/05
1915 lifetime posts
If you look at the manual you will find that the symptoms for bad/obstructed sensor is EXACTLY WHAT YOU ARE SEEING.

Either the sensor is bad or the wiring to it is bad.

You gave two differne model number.

139.53753 does not show up in the cross reference. So I don't know which series it is.

http://www.aaaremotes.com/liftmastercompatibilitychart.html

The other model number (139.)53985 does not either, but it shows as a current model on Sears.

Based on that it uses this this set of sensors.

http://www.aaaremotes.com/lifchamgardo.html

There is no way of bypassing the sensors.
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