Garage door opener opens automatically
I have an old garage door opener. The one requires changing jumper on the remote and the opener to change the frequency. So, the opener does not have any optic eyes.
In the past year, sometimes it reopens 10 mins or few hours after being closed. I was shocked sometimes when I get home from work and realized the garage door was wide opened. I moved to this house for 5 years and I didn't make any changes to the opener recently. I don't think it was from a thief or neighbors' similar opener. Is that an easy way to diagnose the problem? I am not that handy but I may try.
Thanks in advance.