I have a craftman 1/2 hp garage opener about 15 year old. Even since I brought a new remote control 2 month ago. my neighbor's remote can open my garage. But his control would not able to close my garage. My remotes both new and old ones can not control my neighbor's garage door. I have try to erase the memorize on my opener by press the big botton on the back of the opener for 30 seconds. I saw the red led light turn off after severial seconds. But my old remotes can still control the opener. (I have returned my new remote to the store). My neighbor is a renter. He is not willing to try to reprogram his own opener. What can I do ? thank you.

sounds to me like the remotes are on different coding schemes, one is on billion code, the other on rolling code. the GDO will work with either at a time, but cannot do both type simutaneously. you say 3 remotes, i would program the 2 you did not change the batteries in and see if they both work together. also, if your GDO is like mine, pressing the learn button for more than just a second will erase it and you hav eto start over. are you sure you are not accidently doing this when trying to set up the additional remotes?

Hi, I found that Lithium Batteries work better in the cold weather than Alkalines. The only gotya is price. It cost me $10 for four AAA batteries. I am using them in the outside sensors this year. Last year I had to replace the Alkaline batteries a couple of times during the winter. I also occasionally bring in a remote sensor if I'm having problems and place it on the hot water baseboard heat units in the house. This drives away any internal condensation that may be causing problems. (Don't try on electric baseboard heat - it may get too hot). Usually one day on the heat vent is plenty to dry out the unit. Ken

I have Craftsman opener which is made by Chamberlain. Go to the Chamberlain.com website for the support phone number. I called them with a problem and they were very helpful.