Hence the need "220V Cooling Fan" user sent the car repair shop for repair to restore the cooling fan low speed operation; if you do not repair, car "220V Cooling Fan" will directly start working in high-speed mode at higher temperatures next, although it can be cooled, but the engine compartment temperature is relatively high, it is not conducive to long-term work. The car repair shop to replace the governor general will not resistance, but directly replace the entire cooling fans. So "220V Cooling Fan" design manufacturers have been looking for a recoverable overtemperature protection.