Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
One sensor light is green and the other is green. itryed to allign and removed all obstructions and cleaned the sensors. what next???
Your door must have a pressure switch, and it is hitting the floor before the motor stops.
with the door topped out, release the lock and push the door closer to the motor and relock.
have a helper present to be safe
Posted on Jul 03, 2009
If your door reverses when it hits the floor and the main light does not flash 10 times then the door is just closing too far. On the side of the motor unit you will find the 'down limit' control. Turn this a bit in the opposite direction of the arrow printed on the cover. It may take some adjusting to get it just right.
Posted on Jul 04, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Feb 15, 2011 | Sears Craftsman LiftMaster Chamberlain...
Clear any obstruction from between the safety
sensors. Loose leaves, trash, and dirt on the lens of the sensor
itself are all examples of things that can obstruct the sensor's
Check each sensor for a steady
glowing indicator light. If both indicator lights are on, or if one
indicator light is flickering, the sensors may be slightly
misaligned. To check for misalignment; obstruct the beam of the
sensors so that they cannot see each other. When the beam is
blocked, the indicator light on one of the two sensors will
temporarily go out. This is the receiving sensor. Remove the
obstruction and loosen the wing nut on the back of the receiving
sensor. Adjust the receiving sensor until the green indicator light
goes out, if not already out, then realign until the green light is
bright and steady, then retighten the wing nut. This usually takes a
couple of attempts before it is back in alignment.
Oct 30, 2010 | Sears Craftsman LiftMaster Chamberlain...
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