What does the fuser do in a laser printer?

Which laser printer component protects a fuser from overheating?

• Answer:

  Fuser temperature control A temperature sensor riding on the fuser roller changes resistance affecting current flow from engine control board, through sensor, back to engine control board. Debre buildup under sensor and degredation of sensor will affect normal operation. Thermal fuse only protects from possible fire starting; heating lamp/ceramic strip most always blows first. Over heating usually due to engine control board but in LJ III was due to AC power module stuck, supplying continuous 24 Volts DC to turn on lamp; this lamp always has 120VAC incase you don't unplug printer first.... If fuser heats without blowing... clean sensor within fuser assy with que tip and alcohol or replace fuser if paper being overheated first; then engine control board second.