Engine Fan Thermostatic Switch for all Military Humvees

Thermostatic engine fan switch.  215 DEGREE FAN DRIVE THERMOSTATIC SWITCH FOR ALL HMMWV MODELS, 6.2 OR 6.5.  Part number 12338599.  NSN 5930012377322

Thermostatic Switch To Control Engine Fan for HUMVEE, HMMWV .  Replaces Factory Part # 12338599.  This Is Not Cold Advance Thermostatic Switch. The function of this switch is to signal the hydraulic fan clutch to engage and cool the engine down.