Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
We are having an issue with a Sears Craftsmen Garage door opener where the remote will only work either very close to the house or intermittantly at a distance. We have changed batteries, re-"learned" the remotes by resetting the codes and by trying a different remote. One of the safety sensors is showing a yellow light but it is in line with the other remote. The garage door opener is working fine from the manual button.
Lift Master Security Plus remote works only intermitenly, It seems to lock after a few tries, Works from inside garage, Seems to lock up after few tries, Wall opener fine. Changed batteries several times. Can't understand why it works and then doesn't. Tried cleaning sensors and wires,
Posted on Oct 29, 2008
No matter what frequency you have you can do some things to limit the interference. Make sure your antenna wire is hanging down and free. Make sure there is nothing between the antenna wire and the garage door. The wire should be at least 6 to 8 inches long. You can try adding more length by stripping the insulation back on the antenna wire and another peice of copper wire about the same gauge. Twist the ends together and put some electrical tape over them. See how this works.
Posted on Apr 15, 2009
Chamberlain still makes the 390 MGHZ reciever, i just order it today.
Posted on Jan 13, 2010
I think one person is confused about the frequency interference problem. 390 megahertz is to be avoided because the military and homeland security started using this frequency in 2004. They have exclusive rights to this frequency so switching to 310, 315 or 318 megahertz will eliminate this particular problem but may not help out with other forms of interference. No one is manufacturing 390 MGHZ any longer.
Posted on Jun 19, 2008
Had the same problem with my hormann door. Realised that it was our Tomy baby monitor causing the interference. Performed a simple test, baby monitor switched on = garage door does not respond to remote from a distance. Baby monitor switched off = all working fine!
Posted on Jan 15, 2013
I purchased a Overhead garage door opener 2 years ago, and it has both 315 and 390 megahertz. I don't know about military/homeland security stuffs you said, but the company do recommended to use 390 megahertz if 315 is weaker due to interferences.
Posted on Nov 15, 2008
Had and still have the same problem. Sears refuses to fix, but acknowledged that the problem is caused by rf interference with their 315 mhz frequency use by motion sensors, etc... They will not post this on a web site or any advertisement. They will not put in any manual, nor do they have any fix. I took off and threw out a motion sensor on my light and innitially fixed the problem. I recently installed a water fountain bird bath with six small LED lights in a front garden, which shut down my remotes AND my home links in my cars. The probl;em has been isolated to the LED lights! Sears advised that Chamberlain makes their garage door openers. Chamberlain blamed the water fountain manufacturer. Both refused to fix. I am switching to a Genie which operates at 390 mhz.
Posted on May 17, 2008
A lot of time the reason the remote works close, but not far away is the radio wave. Anything that you plug into a wall, will give out its own radio wave, even a light bulb. Now if you have anything close to the same frequency it will jam out the remotes. You can try changing out the logic board, or make your anti wire longer, by just splicing it with any wire.
Posted on Mar 31, 2008
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Posted on Jan 02, 2017
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