Where is heater fuse-2003 Hyundai Elantra located?

In a 2003 Hyundai Elantra, the heater fuse is located in the fuse box, which is typically found under the dashboard on the driver's side. You can access the fuse box by removing the cover, and the specific fuse for the heater is usually labeled in the diagram on the inside of the cover. If you're having trouble, consult the owner’s manual for the exact fuse designation and location.