Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
After adjusted up and down and force, try and works fine, two hours later press open and door open up to the right position, then press down the door will push all the way to the ground hard and goes all up and stop with 5 blinks. adjust again, tested fine but two hours later happen again. Seems like it doesn't have long time memory. please help.
Call chamberlain on there 800 number a tec will discuss the problem with you.
You can reach our friendly and knowledgeable technical support staff by calling1-800-528-5880
Posted on May 10, 2014
A 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017
Okay...upon further inspection, my left spring has broken in two. Going to call around for some quotes to replace the spring. Thanks for the suggestions.
Posted on Jul 25, 2008
SOURCE: Craftsman 1/2 hp door opener
My problem is similar, but it seems to occur only at temps near or below 40 degrees. I have to hold the wall mounted control to force it to close as the remotes do not work on closing but only opening.
Posted on Oct 30, 2008
You have a door sensor problem. Either your main light bulb is burned out or you don't have one in your opener. The clicking sound you hear is the relay for the light. Both of the door sensors should have a small light that is lit. Tweak them until they are.
Posted on Jun 29, 2009
Okay here we go.
Make sure you put the black cup back on the end of the motor shaft and that it is pressed all the way on. Make sure the RPM sensor is plugged in. If neither of these is the issue, then you probably did not have the motor shaft pushed all the way back when you tightened the coupler after replacing the worm gear. Loosen that coupler up and from the front of the motor (opposite end in which the coupler is on) push the shaft back as far as it will go. Hold it there while you tighten the coupler back up and then give it a try.
Posted on Jul 06, 2009
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