That could be a sign of a shorted thermostat wire. First, check your A/C settings in your controls and make sure there isn't something there that is creating this problem. Maybe an "Auto" setting, or something like that. I definitely would call a dealer and put this in front of them and see what they say if you can't figure it out. They might be able to help you over the phone if it's a settings issue. I haven't experienced this problem, so maybe someone else can chime in if they've seen this and enlighten you better.
