Diagnosis
You've got a complete loss of power, which usually points to the thermal safety switch inside being tripped or a failure in the main power connection. These units have multiple overheat protections that can cut all power if they're triggered.
How to Fix It
Unplug the heater and move it to a cool, open area. Let it sit unplugged for at least 30-45 minutes. This gives the internal thermal fuses and safety cut-offs time to fully reset. After waiting, plug it directly into a known-good wall outlet (no power strip or extension cord). Press the power button firmly. Often, this full cool-down reset will bring it back to life.
If That Didn't Work
There's a small chance the tip-over switch got stuck. With the unit unplugged, carefully tilt it back and forth and listen for a faint *click* or *clunk* from the base—that's the weighted safety switch recentering. Try turning it on in different angles (upright, slightly tilted) to see if the switch is making intermittent contact.
Heads Up
If it's still completely dead after a long cool-down and outlet check, the internal thermal fuse may have blown permanently, which requires professional repair. Continuously trying to power it on won't fix that. Using it on a thick carpet or in an overly confined space is a common cause of these safety trips.