This morning when I tried to turn off the seat warmer which was in the High position, it would not turn off, ie, extinquish all three lights, and the third light started blinking. I assume the warmer was still on at this time. All three lights would not extinquish until I turned the car off. When I tried this again to see if it would turn off, it did as it always had before. The manual says to push the button in for 1.5 sec to turn off the warmer. I'm wondering if less than 1.5 sec puts it into the "locked" mode requiring the car to be turned off?