Yes, sticking magnets to the side of a microwave can potentially affect its operation and may cause serious safety hazards. Microwave ovens work by generating electromagnetic waves that heat up food by exciting water molecules within it. The design of the microwave is carefully engineered to contain these electromagnetic waves and prevent them from escaping.
If you attach magnets to the sides of the microwave, it can interfere with the proper distribution of the electromagnetic waves and disrupt the microwave's performance. This interference might result in uneven cooking or heating, potentially leaving some parts of the food undercooked while others are overheated.
Furthermore, interfering with the electromagnetic waves could also lead to electrical arcing, where electrical sparks occur inside the microwave. This can damage the microwave and pose a fire hazard. Additionally, the presence of magnets near electronic components inside the microwave could cause malfunctioning, leading to potential safety risks.
For these reasons, it is strongly advised not to stick magnets or any other objects to the sides or inside of a microwave. It's essential to keep the microwave's interior and exterior surfaces clear and follow the manufacturer's guidelines to ensure safe and efficient operation.