Digital Fan Controller (PWM)

Digital PWM Fan Controller P/N 3655

Hayden's digital fan controller incorporates pulse width technology. This unique controller varies fan speed based on your custom temperature setting giving cooling when needed, not when you don’t. With adjustable set points between 120˚F-210˚F, this digital controller has no contacts to wear out and no relays to replace, ever. Its auto on feature with A/C engagement and auto shutdown when key off ensures you get the cooling you need while extending fan life. Hermetically sealed electronics and EMI suppression ensure long life and trouble free operation. Temperature probe, wiring and installation instructions included.


  • Bolt mounts to firewall or directly onto fan shroud
  • Create your own custom temperature profile
  • Adjustable set points between 120˚F - 210˚F
  • Acquires full speed at 10˚ above set point
  • 90˚F to 210˚F operating range

Optional 3/8” MPT brass sending unit also available, Hayden part #355

Download Links:

Click here for the PWM instruction sheet - English

Click here for the PWM instruction sheet - Spanish

Click here for the PWM instruction sheet - French

Download Product Information