If you were baking something in the oven and have turned it off, but it still appears to be making a sound, there could be a few possible explanations:
Cooling fan: Many ovens are equipped with a cooling fan that runs after the oven is turned off. The cooling fan helps dissipate excess heat from the oven, ensuring it cools down more quickly and efficiently. This fan may continue to run for some time even after you turn off the oven.
Timer or display: Some ovens have timers or digital displays that continue to operate even after the oven has been turned off. The display might show the remaining cooking time or other information related to the oven's operation.
Mechanical noises: Ovens can sometimes emit mechanical noises as they cool down. These noises are often normal and are caused by the metal parts of the oven expanding and contracting due to temperature changes.
In most cases, the sounds you hear after turning off the oven are normal and part of the oven's regular operation. The cooling fan and other components may continue to function until the oven has cooled down sufficiently.
If the oven doesn't turn off, is making unusual or loud noises, or you notice any unusual smells or smoke, you should immediately turn off the oven and unplug it from the power source. This could indicate a malfunction or potential safety issue, and in such cases, it's best to contact a professional appliance repair service to inspect and fix the oven.
If the oven is just making normal cooling sounds and you're confident that everything is working correctly, you can let it sit and cool down. After some time, the sounds should subside, and the oven should be safe to use again for your next baking or cooking task.