Now, lift up the lid and peer inside your machine. Is there actually water in there? Don’t just assume. I’ve been burned by “empty tank” syndrome more times than I’d like to admit. It’s the coffee pot’s way of saying, “You forgot to refill me, you beautiful disaster.”
If it’s bone dry, you’ve found your culprit. Fill it up, but don’t gloat yet—you might just be chasing a ghost. Sometimes it’s full, but a little air bubble sits in the wrong spot, tricking the sensor.