¶ 1.Tools：
- S2.5 allen key
- Phillips screwdriver
- Multimeter
¶ 2.Check the hotbed wiring:
¶ Step 1: Turn off the printer
Before checking the wiring, turn off the printer and disconnect the power supply to ensure safe operation.
¶ Step 2: Remove the printer base plate
Use an S2.5 Allen wrench to unscrew the two screws holding the base plate. Remove the cooling fan cable and remove the bottom plate.