So far after I slightly turned the amplifier up, I don't think it has stayed open when it shouldn't. Reason for no updates is that most days since then have been in the 40's and up, so it has only closed for a few hours since and I don't have enough of a sample size to be sure if it is working properly. A couple of mornings I found the exit
door open, but it was right around 40 degrees and it is very possible that it was cold when the car went in so the entrance
door closed, but then it warmed up enough while the car wash washing, so the exit stayed open when the car exited about 6 minutes later. I've see that happen before, so it's possible. I did finally find my loop detector, it was inside the ER in the TF control box. If it stays open again, I was going to swap the control for the loop detector.