my key fob is not working. changed the battery still not working

Jim time to take her to dealer and have it looked at

I had this happen yesterday, I had the batteries changed in both fobs and went back to unlock my car and they still didn't work. What a mess. I had to use the key that is hidden inside the fob and got the door open only to have the car alarm start blaring and couldn't get it to stop, couldn't get the car to start either. Finally a nice gentlemen came out of the bank to help. He said that the fob just needed time to reset. Car started right up and the alarm went off. I have had several times when my key fob hasn't worked. I also had the Ford dealer do a electronic check on the car to see if they could find anything wrong. They found nothing. I bought this car used and have had it for a little over two years. I think I will go back to a Ford.

How long does it take to reset