My Villager Gs keyless entry doesn't work when its hot outside.I have to use my key and it will unlock the front doors but not the sliding doors. The windows will not come down for nothing. I have to run the air conditoner and drive around for at least 10 minutes. then the door will come back to normal until I have to do the same thing all over. When the weather is cool I have no problems. Could this be an electrical problem?