Canon Color imageCLASS MF8170c Basic Manual page 137

If the paper jam message is still displayed, unplug the power cord
from the wall outlet.
CAUTION
The fuser unit and the surrounding area can become extremely hot during
operation. Perform the following procedure after the fuser unit has cooled down
completely. Touching the fuser unit when it is still hot may result in burns.
9
Close the face up cover.
Clearing Jams 9-15