The Mighty Mule MM360 opener bought from Tractor Supply on 12/15/2018 failed about October 15, 2021.
On October 21, 2021, bought the current replacement model MM371W. It was operational on 10/22/2021. For help with problems call M-F, 7 am – 6 pm (CT), 800-543-1236.
FM143 – Automatic Gate Lock
Installation Manual & Troubleshooter here.
https://www.youtube.com/watch?v=A-eGO8UmTJY&ab_channel=TipsNNTricks
https://www.mightymule.com/wp-content/uploads/FM143-Auto-Gate-Lock-0525-10024428-Rev-B.pdf