Derale Performance Engine Cooling Fan Controller
Derale Performance 16749 Adjustable Electric Fan Controller with 3/8" NPT Probe
Derale Performance 16788 Adjustable Dual Fan Temperature Controller 150-240°F
Derale Performance 16759 Adjustable Electric Fan Controller with Push-In Radiator Probe
Derale Performance 16797 PWM Fan Controller, Flush Surface Mount Sending Unit
Derale Performance 16779 High Amperage Adjustable Electric Fan Controller with 3/8" NPT Probe
Derale Performance 16739 Single Stage Fan Controller 180°F Thread-In Probe
Derale Performance 16738 Electric Fan Controller 180°F Turn-On Temperature with Relay
Precision Temperature Control from Derale Performance
When it comes to managing engine heat intelligently, few names carry as much weight as Derale Performance. Their lineup of engine cooling fan controllers goes well beyond a simple on/off switch — these units are engineered to actively manage electric fan speed in real time, keeping your engine at its optimal operating temperature without taxing your electrical system.
PWM Technology: Proactive, Not Reactive
The centerpiece of Derale's fan controller lineup is their patented PWM (Pulse Width Modulation) fan controller. Traditional relay-based cooling setups operate reactively — fans snap on at full power when temps climb, then shut off entirely, causing temperature swings of up to 15 degrees and repeated high-amp electrical spikes. Derale's approach is fundamentally different.
Derale's PWM fan controllers continuously monitor engine temperature and modulate fan speed anywhere from 0 to 100%, maintaining a consistent, preset target temperature. Because the fans rarely need to run at full speed, the electrical draw is significantly reduced — meaning less strain on your alternator and wiring harness.
Soft-Start Technology for Component Protection
One of the most damaging moments for an electric fan and its associated wiring is the instant it turns on at full power. Derale addresses this with their Soft Start Technology, which ramps fan speed up gradually rather than delivering a sudden current surge. This eliminates harmful amperage spikes that can shorten component life and generate excess heat in wiring.
Key Features Across Derale's Fan Controller Range
- Adjustable temperature activation — wide activation ranges (as low as 150°F) let you dial in the exact operating temperature for your application
- High-amperage capacity — select models support multiple electric fans with combined capacity up to 65–70 amps
- Built-in A/C override circuit — ensures fans activate automatically when the air conditioning is engaged
- Automatic resetting circuit breaker — built-in protection against shorts and overloads
- Finned aluminum housing — durable, heat-dissipating construction built for engine bay environments
- Post-shutdown fan operation — the controller keeps fans running briefly after engine shutoff to prevent heat soak
- Multiple sensor options — push-in probe, flush surface-mount, and NPT sensor configurations available across the lineup
Who Are These Controllers Built For?
Whether you're swapping in an electric fan on a classic muscle car, upgrading a diesel truck, or building a dedicated track car, Derale's controllers are designed to integrate cleanly into virtually any 12-volt electric fan setup. The wiring is straightforward — the controller simply installs between the battery and the fans — and Derale backs their products with U.S.-based technical support for installation guidance.
Explore the full Derale Performance brand page to discover their complete cooling ecosystem, or browse all engine cooling fan controllers to find the right unit for your vehicle and fan configuration.