Turn off the range breaker in your home's service panel, or unplug the power cord if it is accessible.
Open the oven door and look at the underside of the front of the flat-top panel. Locate the screws that secure the top to the cabinet. There may be two to four screws, depending on the model of your Jenn-Air range.
Remove the screws from the underside of the front of the flat-top panel then close the oven door.
Lift the main top up, and secure it in an elevated position using a support rod.
Remove the screws and brackets securing each burner to the underside of the flat-top panel.
Lift the panel up and off of the range.