How to determine Tiny Cooling Fan false failures?

"Tiny Cooling Fan" improper use, or the surrounding conditions change, the external power accident caused by a number of objective factors such as non-substantive failure families find it difficult to judge and eager to please people hands-maintenance, thus increasing the real failures caused by human activity, not only increase costs, but also affected the normal family life and work in the hot summer. So in the context to help readers improve household "Tiny Cooling Fan" in the use of knowledge, improve their quality of life. Full Metal fan housing material is the use of thin white embossed plastic, light weight, elegant appearance, but will change with temperature, thermal expansion and contraction of the physical phenomenon, it is a fan of "split shot" sound is the case sound small deformation, and not a malfunction. "Tiny Cooling Fan" operation when occasionally produce some products like water "rushing" sound.