Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
The door sensors may have been bumped. They need to point at one another to work properly. Tweak them and see if the light will come on. If not the sensor or the wiring connected to it is bad.
Posted on Jun 25, 2009
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Posted on Jan 02, 2017
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Mar 13, 2015 | Building Materials
Oct 16, 2014 | Building Materials
WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.
ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.
Oct 10, 2010 | Chamberlain Powerdrive PD422D 1/2 HP...
reversing sensors must be connected and aligned correctly before the
garage door opener will close. An obstruction in the path of the
sensor will also cause your door to not close.
This sensor is an electronic
beam, which is sent between two sending and receiving "eyes".
These eyes face each other and are located just inside your garage
door. They may need to be adjusted so the beam from the sending eye
is properly detected by the receiving eye. Once the receiving eye
"sees" the beam from the sending eye, a green indicator light
will glow on the top of the eye. Tweak them a bit. If both lights do not come on you have bad sensors.
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