Disconnect the power.
First you have to take the unit out of its installed location.
Lay it on a smooth flat surface glass side down.
Remove the screws securing the top to the burner box bottom.
Remove the screws holding the controls and the conduit mounting plate to the burner box.
Remove the top.
When reassembling make sure the insulation in the front left and right rear corners is in place. | 
Glass top range 
