FASTSTORM Digital Radiator Fan Switch Kit 12V/24V Adjustable 104–230°F Dual Fan Control IP54

FASTSTORM’s Digital Radiator Fan Switch Kit is a compact, IP54-rated controller and sensor set that automatically runs one or two electric cooling fans between 104°F and 230°F for reliable temperature regulation in 12V and 24V systems.

This adjustable thermatic fan switch replaces Part #0444/DC0444 and is designed to integrate with most electric radiator fans, EWPs and vehicle cooling setups. The kit includes a pre-installed sensor for radiator-fin mounting, pre-labeled wiring, hardware, and a clear wiring diagram so you can get the controller wired and working quickly. A bright LED display shows both the live temperature and your set point in °F or °C, while built-in logic staggers the second fan to reduce inrush current and protect relays.

How does this kit know when to turn the fan(s) on and off?

The controller reads the temperature from a probe positioned between radiator fins and compares it to the set point you choose. When the measured temperature reaches the set point the primary fan engages; the secondary fan follows after a short delay if configured.

• Adjustable range: 104°F–230°F (40°C–110°C).
• LED shows real-time temperature and set temperature; hold to switch units.
• Fans stop when temperature drops 1°C below the set point to avoid short cycling.
• Built-in 10-second delay before Fan #2 to limit startup current.

Will it work with my 12V or 24V vehicle electrical system?

Yes — the FASTSTORM controller supports nominal 12V and 24V systems and can switch fans with operating voltages from 12V up to 27V. The kit includes the relay(s) suited for both voltages; simply replace relays as directed for 24V installations.

• Maximum fan voltage: 12–27V, compatible with most automotive and truck fans.
• Includes relays and pre-labeled wiring to simplify installation.
• IP54 housing helps protect electronics from dust and splashes when mounted correctly.
• Avoid mounting near exhausts or extreme heat sources for reliable life span.

How easy is the installation and what is included?

The kit ships with the temperature sensor pre-installed into a probe housing sized for radiator fin mounting, plus labeled wiring, mounting hardware and a clear wiring diagram. Typical installs are straightforward for anyone comfortable with basic automotive electrical work.

• Direct replacement for Part #0444/DC0444; fits most Thermatic fan systems.
• Pre-labeled wires speed connection to fans, power, ground and relays.
• Sensor is designed to be placed between radiator fins for accurate air temp readings.
• Simple unit controls: set temperature, switch °C/°F, and automatic hysteresis.

What safety and performance features help protect my vehicle’s electrical system?

The controller’s staggered fan start and hysteresis reduce relay stress and prevent frequent on/off cycles. IP54 protection guards electronics from dust and water spray, and the kit’s wiring and relays are selected to match fan loads when installed as instructed.

• 10-second delay before second fan starts to limit inrush current.
• 1°C off differential prevents rapid cycling and extends relay life.
• IP54 enclosure resists dust and splash exposure when mounted properly.
• Pre-labeled harness and correct relay sizing reduce wiring errors.

Who this is for: drivers, mechanics and DIY enthusiasts who want precise, adjustable fan control for cars, trucks, off-road rigs and performance builds. It’s ideal when you need a reliable replacement for a failed thermatic switch or want finer temperature management than a fixed thermostat alone. If you run one or two electric fans and require a durable, programmable solution that fits both 12V and 24V electrical systems, this kit offers a direct-fit, easy-to-install option with clear temperature feedback and built-in protections.