Turn off your dryer unit and unplug it.
Pull the end tabs off of the top control panel and insert a putty knife under the corners of the control panel. Pry up to pop the control panel off.
Remove the screws at the base of the control panel using a Phillips screwdriver.
Slide the top panel of the dryer off.
Pop the bottom front panel of your dryer (if there is one) off with the tip of a flat-head screwdriver.
Unplug the wiring connected to the rear of the top front panel.
Remove the screws on the top and corners of the front panel and remove it, using a Phillips screwdriver.
Locate the metal burner tube in the dryer. It may be necessary to slide the drum out of the dryer in order to access the burner.
Remove the screw holding the metal bracket in place at the base of the burner assembly. Remove the mounting bracket.
Slide the new ignitor into the mounting bracket and fit the bracket over the burner.
Tighten the bracket mounting screw.
Plug the male end of the wiring near the burner into the female end of the ignitor wiring harness.
Reassemble the dryer.