I first used only a keypad to open the door. I then decided to have a tech come out and program the homelink feature in my car (and also because the door needed general maintenance). The tech used the learn feature on the opener and programmed a remote. Then, the tech had me program the homelink. Everything worked just fine, but I chose not to keep the remote.
Now all the sudden the keypad doesn’t work. I know I’m entering the right code. I see a red light with each button p press. After the pressing the up/down button the red light is flashing for a few seconds. I put new batteries in and no change. I’m now locked out of the garage.
Opener is model cm8600ic. I have a tech coming out in a l couple of days but I don’t understand what happened. How can the keypad work after programming and then a few days later stop working?