DIAGNOSIS Yeah, this one's common. The warming plate on these models is not a high-wattage hot plate; it's designed for 'keep-warm' temps, not reheat. If it's truly cold, the internal thermal fuse might have blown.
FIX First, ensure you're using the 'Keep Warm' function. The plate only heats if you press the 'Keep Warm' button after brewing starts (the light should be on). If it's on and still cold, unplug the machine and let it cool completely. Often, the fuse will reset itself after it cools down.
IF THAT DIDN'T WORK If it's permanently cold, the thermal fuse (a small safety component on the warming plate circuit) has likely failed. This is not a user-serviceable part on this model and would require replacement of the base unit or a professional repair.
HEADS UP These warmers are notorious for not keeping coffee piping hot for more than an hour. If you're a slow drinker, consider a thermal carafe model next time—the glass carafe loses heat fast even with a working plate.