Unplug your Spacemaker's power cable from the nearby outlet to temporarily disable power.
Open the fuse box in your home and find the fuses that control your GE Spacemaker. The fuses' sections are labeled by room to easily determine the correct fuse.
Turn the fuse counterclockwise to remove the fuse from its port in the box. Insert a new fuse in the empty port, and turn it clockwise to secure it into place.
Unscrew the second fuse in the fuse box and replace it with a new fuse. Turn the fuse to the right until it is secure but not too tight, as this can break the fuse.
Plug the Spacemaker's power cable back into the power outlet, and push "Start" to resume the cycle.