FASTSTORM Digital Radiator Fan Switch 12V/24V Dual-Fan Kit — Adjustable 104–230°F, LED Display

FASTSTORM's Digital Radiator Fan Switch Kit is an adjustable 12V/24V dual-fan controller with a temperature range of 104°F–230°F that replaces part #0444 and automates cooling for one or two electric fans.

This compact kit pairs a digital controller, inline relays, and a fin-mounted temperature sensor to deliver precise fan activation across a wide voltage window. It displays both set and real-time temperatures in °F or °C on an LED screen, delays the second fan to prevent inrush overload, and fits most automotive, truck, and off-road cooling systems as a direct replacement for DC0444-style switches.

How does the controller manage two fans without tripping circuits?

The FASTSTORM unit stages fan activation: Fan #1 starts immediately at the set temperature, and Fan #2 powers up after a ten-second delay to limit simultaneous current draw. Built-in relays matched to the supplied wiring harness handle common inrush currents for 12V and 24V systems, reducing strain on the vehicle's electrical system.

• 10-second delayed start for the second fan to reduce fuse and relay stress
• Includes relays and wiring labeled for straightforward connections
• Supports fans operating from 12–27V, suitable for dual-voltage applications
• Automatic shutoff when temperature drops 1°C below the set point

What temperatures can I set and how is accuracy shown?

The kit offers a wide, adjustable temperature window from 104°F to 230°F (40°C–110°C) to accommodate a broad range of engines and operating conditions. The LED display presents both the live temperature and your selected threshold; hold the unit's button for five seconds to switch display units between °F and °C.

• Adjustable range: 104°F–230°F (40°C–110°C)
• LED shows both current and set temperatures for instant verification
• Unit toggle by holding the control button for 5 seconds
• Fans stop when coolant area temperature falls 1°C below the target

Is installation difficult and what comes in the box?

Installation is designed to be straightforward for enthusiasts and mechanics: the sensor mounts between radiator fins, and the pre-labeled wiring harness and hardware simplify electrical connections. A clear wiring diagram is included, and relays for 24V conversions are supplied so you can fit the kit into most systems without sourcing extra parts.

• Pre-installed fin sensor for quick mounting into radiator fins
• Pre-labeled wires and hardware to reduce installation errors
• Wiring diagram included for standard fan and dual-fan setups
• Extra relays provided for compatibility with 24V systems

Will this kit work with my vehicle's electrical system?

The FASTSTORM controller supports a broad range of electric fans and cooling configurations and is specified as a direct replacement for Part #0444/DC0444. It operates with fan voltages from 12V up to 27V, but we recommend routing and mounting away from extreme heat sources like exhaust manifolds for safe, reliable performance.

• Direct replacement for DC0444-style fan switches
• Rated for fans running on 12–27V systems (12V and 24V ready)
• Recommended installation away from exhaust and hot components
• Compatible with Thermatic-style electric fans and EWPs

Who is this for: The FASTSTORM Digital Radiator Fan Switch Kit is built for vehicle owners who want tighter temperature control, mechanics upgrading cooling systems, and performance enthusiasts running higher-power fans or dual-fan setups. It suits cars, light trucks, off-road rigs, and any application where a DC0444-style electronic fan switch would be used and benefits those who prefer a clear digital display and straightforward installation.