Why Is My Oven Taking So Long to Heat Up?

If your oven seems to be heating slowly, it could be due to several factors. A properly functioning oven should reach its set temperature within 10–15 minutes, depending on the model and size. Here are the most common causes for longer heating times.

1. Faulty Heating Element

The heating element is responsible for generating heat inside your oven. If it’s worn out, damaged, or partially burned through, it won’t reach the correct temperature efficiently. You can check if it glows red when heating – if not, it may need replacement.

2. Temperature Sensor Issues

A faulty temperature sensor can give inaccurate readings to the oven’s control board, causing it to underheat or overheat. If your oven consistently takes too long to warm up, the sensor might need calibration or replacement.

3. Poor Door Seal

If the oven door gasket is worn, torn, or not sealing properly, hot air escapes and the oven has to work harder to reach temperature. Inspect the rubber seal around the door and replace it if it feels brittle or loose.

4. Incorrect Preheating Practices

Opening the door frequently during preheating releases heat and slows the process. Always wait for the preheat signal and avoid loading food too early. Some ovens also offer a rapid preheat function to save time.

5. Fan or Convection Problems

In fan ovens, a faulty fan motor or blocked vent can prevent proper air circulation, leading to uneven heating and longer preheat times.

When to Call a Professional

If your oven still struggles to reach temperature after checking these points, it’s best to call a qualified engineer. They can safely test the electrical components and diagnose deeper issues that aren’t visible.