Do you have a button with a lock symbol on the button panel in the garage? Does it also have a green light (LED) on the panel in the garage? Is it flashing? If you answered yes to these questions, it sounds like you may have inadvertently put the opener into "vacation" mode which disables the remotes. Hold the lock button down for ~5seconds, the LED should be on steady and your remotes should work. Note: holding it for another 5 seconds will cause the LED to flash and you will be in "Vacation" mode. Hope that helps.

I'm not sure this is the answer to your problem but try holding the light button in for 10 seconds on the wall control. This will normally toggle the feature where the light comes on when you interrupt the sensors.

It ssems that it tries to work when the chain is going one way but not reverse.

sdello -- Let's get one thing perfectly clear. Neither I nor my husband had anything to do with the improper installation of the sensors. We did not install the sensors, nor did we ask that the sensors be installed in such a way as to defeat the safety purpose for which they were designed. That is all on the shoulders of the two guys that installed the new garage door opener. When I saw they'd be installed that way, I asked what the heck was going on, and the lead guy claimed that this was the only way they could be installed because (he claimed) there "wasn't enough room" on one side of the door to install the sensor there. In actuality, there WAS AND STILL IS enough room at that spot. That's where the sensor for the opener that was being replaced had been installed. I think the guy was afraid a "daddy longlegs" might come out from behind something and crawl across his hand.