Try combaring the cabin the temperature to when the seat(s) operate correctly. I watched this over the weekend and it is following it to a tee! When the cabin temperature is hot, the seats don't operate. As soon as you turn on the A/C and it starts cooling down (say 5 minutes) the seats start to work - like clock work! Same thing if I don't use the A/C. Car first thing on morning or in evening when cool, they work fine. But after sitting out in the sun for a while - no dice! I am going to try putting a thermometer in the car to see if I can get a temperature range. Does anyone know if the seat motors have a thermal overload protection?