Thermal Fan Clutches operate in response to underhood temperatures. When the engine is cold, the fan is disconnected; when too much heat is generated, the fan is allowed to cool the engine. A bi-metal thermostatic coil mounted at the front of the clutch senses the underhood temperature and operates the clutch accordingly.

Features:

• Varies the fan speed with temperature of the air behind the radiator.
• Engaged (high speed) operation provides maximum cooling.
• Disengaged (low speed) operation provides fuel savings and noise reduction.
• Greater life expectancy than a non-thermal clutch.
• Briefly engaged at cold start-up.
• Engages at about 170° radiator air temperature, (about 30° lower than coolant temperature).