If the oven is not reaching the desired temperature for baking, it may be time to replace its heating element. A blistered or separated element is also an indication that it should be replaced.
To replace a heating element, one should check its model or part number, along with the name of its manufacturer, and match these to any potential replacement. Before installing a new element, it is important to turn off the oven's power at the breaker box and unplug it. After removing the screws that hold the old element to the oven, the new one can be installed and tested.