Challenger 9300 Series Garage Door Opener
I have a Challenger 9300 Series Garage Door system. I replaced the battery in my remote control and the door would open and close and it functioned perfectly for a week or so.
Now the remote doesn't work even though it has a new battery. The wall switch still works and the wall switch will open and close the door.
It sounds like you need to replace your remote.
You can find new ones at Wayne Dalton Remotes