1. Primary Cooling Fan:
- The primary cooling fan is usually the only fan that operates during normal driving conditions. It turns on when the engine reaches a predetermined temperature, usually around 200-220 degrees Fahrenheit (93-104 degrees Celsius).
- The primary fan helps maintain the desired engine temperature by drawing air through the radiator and over the engine components, dissipating heat into the atmosphere.
2. Secondary Cooling Fan (if equipped):
- Some vehicles have a secondary cooling fan that provides additional cooling support when needed. It usually comes on at a higher temperature, often around 225-235 degrees Fahrenheit (107-113 degrees Celsius).
- The secondary fan works alongside the primary fan when the engine faces extreme temperatures, such as during heavy traffic, hot weather, or strenuous driving conditions.
By having a dual-fan system, vehicles can achieve optimal engine cooling while maintaining fuel efficiency. The primary fan handles most regular cooling needs, while the secondary fan engages only when additional cooling is required. This setup ensures that the engine runs at its ideal operating temperature, preventing overheating and potential damage.
Note: The exact fan operation and temperature thresholds may vary between different vehicle models and manufacturers. It's always best to refer to the owner's manual for your specific vehicle for accurate information.
