TURNED ON PASSENGER SEAT WARMER TO KEEP A MEAL WARM IN A WHITE FOAM FOOD CONTAINER. 5 MINUTES LATER WHEN I ARRIVED AT HOME THE BOTTOM OF THE CONTAINER HAD A MELTED HOLE IN IT. THE SEAT WAS EXTREMELY HOT TO THE TOUCH IN ONE SPOT ON THE SEAT. THE REST OF THE SEAT BOTTOM AND BACK WERE NOT WARM AT ALL. SEVERAL DAYS LATER MY WIFE TURNED THE SEAT WARMER ON TO LOW AND WITHIN A COUPLE OF MINUTES SHE EXCLAIMED THAT THE SEAT WAS BURNING HER BOTTOM. WE SHUT THE SEAT WARMER OFF AND THE SEAT BEGAN TO COOL DOWN. THE SEAT WARMER HAD WORKED JUST FINE BEFORE THESE INCIDENTS. IT COULD HAVE SERIOUSLY BURNED MY WIFE IF COULD GET HOT ENOUGH TO MELT A FOAM FOOD CONTAINER. BOTH TIMES THE TRUCK WAS PARKED AND TRAVELING. TOP SPEED WAS 30ISH.