Is it better to have the fan at back of micowave oven?

The primary function of the fan in a microwave oven is to dissipate the heat produced by the magnetron, which is the component that generates microwaves. By placing the fan at the front of the microwave, the hot air is efficiently expelled, preventing the oven from overheating and potentially causing damage to the internal components.

Placing the fan at the back of the microwave can be less effective in removing heat because it may encounter obstructions, such as the power cord and other components, which can hinder the proper flow of air. Furthermore, having the fan at the back makes it more difficult to clean and maintain, as the fan blades and vents can accumulate grease and food particles over time.

Therefore, it's generally preferable to have the fan at the front of the microwave oven to ensure optimal heat dissipation, efficient performance, and ease of maintenance.