Craftsman 1/2 hp 315 mhz garage opener opens by it selt
After purchasing a new opener, it worked perfect for 6 months. After I programmed by mini van's in car opener to open/close the door, it opens the door when there is not reason to do so. I followed the instructions in the auto manual. I had to use the learn button on the opener because of the rolling codes. Why does the door open by it self?