Limited range of your remote controls could be related to radio frequency interference that comes from something in your home or in the surrounding environment. Certain electrical devices can radiate interference; this could be almost anything that is plugged into an electrical outlet. Please keep in mind that the device can be brand new, or can be an item that has been in use for quite a while. Also, the item may continue to function properly as far as you are able to tell. The only problem with the item may be that it has started to broadcast the interference, with no other symptoms noted. Some devices are more likely to generate interference than others. This includes TV cable, cable amplifiers, surge protectors, fluorescent lights, battery charging devices (power tools, golf carts, etc.), anything that utilizes a timer (sprinkler systems, lights, alarm systems, etc.), and a myriad of others. If the problem seems sporadic, we can safely assume that the device responsible for the interference is only being operated during these times. Again, please keep in mind that the age of the device does not determine if it is capable of broadcasting unwanted interference. Any electrical device can be the source of the problem. To isolate potential sources of interference, turn the circuit breaker off to the garage and plug the garage door opener into an extension cord from another room. If the range improves, then the interference is coming from a device in the garage. If no improvement is seen follow the same procedure, this time turning off the circuit breakers to your home, with the exception of the garage and test the remote controls. If improvement is noted, turn the circuit breakers back on, one by one, until the range problem resurfaces. This will allow you to narrow down what room the problem device is in. You will have to go from there to isolate it further, by unplugging and re-plugging the items in that room. If you are unable to determine any source of interference, then the receiver logic board in the overhead unit will need to be replaced.

I tightened the chain with door closed with adjuster at the top of door - bolt with 2 nuts on it at end of chain..and no luck with the door closing..but I did find a fix to my issue. I found it in a manual online at http://homeappliance.manualsonline.com/manuals/mfg/craftsman/craftsman_garage_door_opener_product_list.html I didn't find my exact model opener but found one that looked similar...page 28 model 13953920DM I made an adjustment to the down force on the back of the opener. (far right adjuster) - Move dial clockwise one or two ticks and now I can push the button once and the door goes down..My setting was on 1 and now I moved it to 3 Hope this helps someone else... Here is a link that might be useful: Home Appliance manuals online

I am having a problem with my garage door closing. I have to hold down the wall switch until it goes all the way down. If I let go of the switch before it goes all the way down, it go back up. I can't use the remote from the car because it goes down then go right back up. One of the sensors is green and the other side is yellow. The yellow side does not blink or turn off when something is placed in front of it, although the green side does. What is this symptom?

"I wanted to add that the sensors both appear to be working properly, they both have solid green lights, no flickering whatsoever, and when the carrier is in the middle of its 3 foot travel, I can put my hand in front of the sensor and it will immediately stop the door. So, my guess is that it is not the sensors." The sensors react only when the door/operator are closing and the beam is interrupted. The reaction is that the door stops and instantly reverses-- to open. Additionally, the light on the opener will flash a few times and the opener is inoperative until the light flashing stops. Does yours do all these things?