Derale Performance is changing the rules of engine temperature control with Smart Technology brought to your car’s cooling system through Derale’s Patented PWM Fan Controller.

Historically, cooling fans run at 100%, even when less airflow is needed, constantly turning on and off as the engine temperature changes. This REACTION based temperature control system causes constant amperage spikes, excessive noise and premature wear. The Derale PWM fan controller continuously monitors your engine’s temperature, therefore CONTROLLING the temperature and increasing the vehicles cooling efficiency, while reducing the amps used to do so.

Here’s how it works; The controller monitors your engine temperature via the radiator, therefore providing the most accurate reading for your cooling system. Using Soft Start Technology, fans ramp up slowly which eliminates harmful AMP spikes. The unit will continuously monitor your engine’s temperature and operate the fans at the optimum fan rate as needed between 1 to 100%. The net result; the electric fans often only run between 40-60% to keep your engine cool. Additional benefits include, reduced fan speeds which means reduced fan noise, which tends to compete with that sweet sound of your engine!

This multi-fan controller has a built-in A/C Over-ride circuit and is designed to control as many 12 volt brushed electric fans as desired, up to 65 Amps combined.

This unit is designed to be a remote mounted controller for your vehicles electric fan(s).

This controller Will Not Work using the following 2-speed O.E. Electric Fans: Dodge Viper, Ford Taurus, Ford Contour, or Lincoln Mark VIII. These fans exceed the amperage & functionality capabilities of this fan controller.

Specifications:
Amp Rating: 65 amp.
Width: 3 1/2″.
Length: 4-7/16″.
Height: 1 3/4″.

Features:
Pulse Width Modulation controls fan(s) speed from 0-100%.
Constantly adjusts fans speed to maintain the desired temperature.
Controls multiple electric fans up to 65 amp capacity.
Finned, aluminum housing.
Includes automatic resetting circuit breaker.
Air Conditioning overide circuit built-in.
US Patent 7006762.