Door seal deterioration is another issue that often flies under the radar. Over time, the rubber gasket around the door frame hardens, cracks, or loses its seal. Warm air leaks out continuously into your kitchen, forcing the oven to work twice as hard to maintain heat. This leads to unevenly cooked dishes and a noticeable bump in your electricity bill. Fan motor failures, broken door hinges, and unresponsive touch control panels are also common reasons Sydney residents seek technical help.