Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ "replace timing chain adjuster 4" Questions

...4 times when door reverses,5 times when overheated. any thouts will be good steve check and see if a spring is broke on either side above the door in the middle. (big springs) that's my problem. I ...

...chain since it was hanging too low. It is easy to replace. It should take about 30 minutes to change. You will need 1/2" wrench to loosen chain and 5/16" wrench to take out screws holding in gera and ...

chain should sag just a little. If you tighten it too much it will click as it goes over the sprocket. You can increase the down force which is an adjustment near where all those white wires go. A 1/4

...chain, everything seems clear. And now, suddenly today the light doesn't work anymore (yes, I replaced the bulb). The opener was installed by previous owner, and I had the actual door replaced when I ...

chain several times and nothing changes. All the gears are aligned and seem to be running smoothly. I don't have manual and the unit is 10 years. What do I do? The wire harness (4 wire) from the limit

...chain. Mount door bracket and adjust. Your door must be in close position. You are ready to go. ive had the same problem many times. i ve checked for solutions and found that the rpm sensor is to far ...

...replace and he found that the drive gear was almost broke off. I had tightened up the chain a month or two before this because it was sagging down far, and had noticed that it was sagging again when ...

...4 attempt it opens a couple of feet then stops then it will open after another attempt any help please If you release the garage door manual does it move smoothly up and down or is there some ...