To replace the heating element in a Spectra oven, remove the heating element and its associated wiring, connect the wiring to the new heating element and replace the screws holding the heating element in place. Refer to the owner's manual to determine which specific heating element to purchase.
After determining the exact make and model of the oven, purchase a new heating element. To install the new heating element, turn the breaker that connects to the oven off, and unplug the oven. Open the oven door, and use a screwdriver to remove the screws holding the heating element in place. Pull the heating element away from the back of the oven slightly to revel the wires connected to the heating element.
Take note of the wire placement, and disconnect the wires with a screwdriver. Remove the old heating element, and set it aside. Place the new heating element inside the oven, connect the wires to the prongs in the appropriate position, and set the new heating element in place. Reinsert and tighten the necessary screws, and plug the oven into the outlet. Turn the breaker to the on position, and turn the oven on to test the new heating element.