Once before I had a problem with this. I plug in the car- and the light just stays white. Once before this happened and if I jiggled the plug it would connect- usually after a couple of tries. At that time the dealer looked at it when I mentioned it during a service appt. and the problem disappeared. Today I went to charge the car and it connected on the third try. After going out, I cannot get to charge at all now. I plug in the charger- the light stays white, I hear a humming noise, the plug icon shows on the dashboard- but it is not charging. I did make sure it is set to charge immediately. If it matters I can tell you it is ~ 20 degrees out, and my 12 volt battery is original - but I've seen no other warnings that it is failing. Any advice or thoughts would be appreciated.