Thermal Radiator Cooling Fan Switches & Controllers

Cold Case Electric Fan Wiring Kits

Cold Case electric fan wiring kits are complete and include all wiring, a thermostat, and a relay for quick and easy installation. These fan control kits can be used with all single fan or multiple fan applications as long as the combined current draw does not exceed 30 amps. Additional features of Cold Case electric fan wiring kits include: * Fans are temperature controlled and kick on at 190 degrees F * Single Cold Case 16 in. fans draw 6 to 8 amps * Dual 12 in. Cold Case fans draw 12 amps

4.61 out of 5 stars ( 38 )

$105.99

Proform Variable Speed Brushless Fan Controllers

Take full control of your cooling system! Proform's advanced digital variable speed fan controllers are designed exclusively for their high-performance brushless fans—and they do it all! With two powerful operating modes, you're in complete command! The temperature mode dials in your ideal engine temperature, and the controller automatically adjusts fan speed to maintain it. The percentage mode sets fan speed manually, regardless of temperature—perfect for custom tuning or specific driving conditions. You can switch between modes on-the-fly with real-time toggling. Built for 12-volt systems, the controllers support one or two Proform brushless fans and include both thread-in and push-in temperature probes for versatile installation. Keep your engine cool, your way with one of these Proform variable speed brushless fan controllers.

4.82 out of 5 stars ( 11 )

$199.95

Dakota Digital Electronic Fan Controllers with Bluetooth

Dakota Digital electronic fan controller with Bluetooth control provide the ultimate in flexibility. Meant to be a simple add-on in any application using an electric fan, the included 70 amp relay is enough for the most power hungry cooling fans. Fully programmable, Dakota Digital electronic fan controllers will work with your existing water temperature gauge, operating from the temperature sending unit already installed. A dedicated sending unit can be installed for applications without a water temperature gauge. Includes the following features: * Compatible with single fan, dual fan, or single two-speed fan applications * User-settable on and off temperatures * Key-off run time adjustable from 0 to 5 minutes * Works with many stock temperature gauge/senders * OBD-II compatible (with purchase of BIM-01-2) * Bluetooth enabled for use with mobile programming/setup app * LED readout for simple programming * Can be directly connected to a Dakota Digital plastic-control box instrument system when used in conjunction with BIM-compatible Dakota Digital instrumentation or a BIM-01-2 --Temperature and vehicle speed data transferred with one connection --Connection allows adjustable highway-speed fan shut off

4.69 out of 5 stars ( 55 )

$175.99

Derale PWM Adjustable Fan Controller Kits

Enhance your engine's performance with a Derale PWM adjustable fan controller kit. Utilizing cutting-edge technology, these Derale Performance fan controllers constantly adjust fan speed to keep the desired engine temperature that can be preset. Additional features include: * Constantly adjust fan speed to maintain the desired temperature * Control multiple electric fans up to 65 amp capacity * Finned aluminum housing * Automatic resetting circuit breaker * Air conditioning override circuit built-in

3.8 out of 5 stars ( 25 )

$343.99

Derale High-Amperage Adjustable Fan Controllers

Derale high-amperage adjustable fan controllers are designed to control your electric fan the right way. They feature a finned, die-cast aluminum housing with a bright finish, an automatic resetting circuit breaker, a built-in air conditioning override circuit, wiring, mounting hardware, and instructions. The Derale Performance high-amperage adjustable fan controllers are available for either single or dual fan applications and come with your choice of a push-in or thread-in radiator probe.

2.97 out of 5 stars ( 157 )

$165.99

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$210.20

Davies Craig Digital Thermatic Fan Switch Kits

Davies Craig digital thermatic fan switch kits sense air temperature as it passes through the radiator with the sensor placed in the fin section. The sensor can also now be placed directly into the coolant system—in combination with a temperature sensor adapter kit. These fan switch assemblies are compatible with 12 or 24 V applications, and feature an adjustable range of 40 to 110 C, or 104 to 230 degrees F. Temperature is set by pressing the set button, and the units can run one or two fans. The second fan (if applicable) will start 10 seconds after the first fan begins cooling. Davies Craig switch kits operate thermally and also when the air conditioning being used.

4.81 out of 5 stars ( 97 )

$69.74

Painless Performance Dual Activation Electric Fan Relay Kits

Painless Performance dual activation electric fan relay kits operate off of a thermostatic switch and are needed when adding A/C to your Hot Rod. These relay kits are exactly what you need. Only a few minutes are needed for the installation. Your cooling fan will come on when the engine reaches the preset temperature of the thermostatic switch mounted in the engine head or when the A/C is turned on. Kits include: * 40 amp relay with mounting base * 30 amp circuit breaker protection for the electric fan * Preterminated and printed wire harness * Thermostatic switch * 1/2 in. NPT to 3/8 in. NPT adapter * Mounting hardware and insulated terminals * Illustrated instruction sheet

4.63 out of 5 stars ( 83 )

$132.99

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$140.99

Summit Racing™ Electric Fan Thermostat Sending Units

Turn your electric fans on and off automatically with these Summit Racing™ electric fan thermostat sending units. Switching your electric fans on and off manually or continually running them can be annoying. These thermostatic low current sending units or switches are designed to ground your fan relays to turn on when they reach the desired temperature and shut off once the engine cools. Available in 2 temperature ranges to suit your needs. Features- • Brass Construction uses 3/8 in. NPT thread • Thermostatic Switch turns on and off • 2 separate models actuate at 185 on-175 off or 200 on-185 off • Low current design intended to trigger or ground a relay

4.04 out of 5 stars ( 126 )

$29.99

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$32.99

Summit Racing™ Electric Fan Thermostat Kits

These Summit Racing™ electric fan thermostat kits are designed to allow your electric fan to turn off and on at certain temperatures. They are available for single or dual fan applications and include all necessary wiring, relays, circuit breakers, sending units, and hardware for installation. Each kit includes detailed instructions.

4.13 out of 5 stars ( 126 )

$46.99

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$65.99

Summit Racing™ Adjustable Electric Fan Controllers

Summit Racing™ adjustable electric fan controllers keep your engine temperature exactly where you want it. These compact controllers are easily adjustable from 32-240 degrees F and turn your electric fan on at 60-percent power then increase fan speed as the temperature rises. A built-in fuse protects the controller from accidental shorts or faulty fans. It features variable fan speed, a 40 amp rating and works on 12-volt systems only. These features allow for greater control over engine temperature and prevent overloading the charging system. Three LED status indicators (SUM-890124 only) let you know that everything is wired and functioning correctly. Summit Racing™ adjustable electric fan controllers take the guesswork out of installation and give your cooling system the protection that it needs.

2.33 out of 5 stars ( 9 )

$81.99

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$144.99

Derale Inline Fan Thermostats

Derale inline fan thermostats allow automatic electric fan controllers to attach to the inlet ports of the oil coolers. They activate the electric fans when fluid temperatures reach 180 degrees F, and shut off the fans when fluid temperatures reach 165 degrees F. For top-quality underhood cooling accessories, trust the expertise of Derale Performance.

3.88 out of 5 stars ( 85 )

$47.99

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$76.99

Derale Deluxe Adjustable Fan Controllers with Radiator Probes

Derale adjustable electric fan controllers with push-in radiator probes are designed to activate up to two fans with a total maximum draw of 25 amps. These redesigned fan control kits adjust fan activation between 150 and 240 degrees F with turn-off preset at 10 degrees F lower than turn-on, making them well suited for racing and towing applications. The probe sensors fit in the fins of the radiator and kits include relay wire harness, electrical connectors, and A/C override circuit as well as ground circuit relay. Operate one 25 amp fan or two fans with a combined draw of 25 amps or less with the easy installation of Derale Performance adjustable electric fan controllers.

4.6 out of 5 stars ( 125 )

$94.99

Spal Variable Temperature Control Sensors

Take precise control of your cooling system with the Spal variable temperature control sensors, engineered specifically for brushless fan applications. These compact, high-performance sensors deliver reliable, adjustable activation within the optimal temperature range, helping maintain consistent engine cooling under varying conditions. Designed for seamless integration with Spal brushless systems, they ensure accurate response, durability in demanding environments, and efficient fan operation to reduce unnecessary load. Ideal for performance builds, restorations, or custom setups, these variable temperature control sensors by Spal provide the confidence of consistent thermal management and long-lasting reliability.

5.0 out of 5 stars ( 1 )

$149.98

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$149.99

Flex-A-Lite Variable Speed Controllers

Flex-A-Lite variable speed controllers attach on or near the electric fan, sensing coolant temperature via a radiator probe or temperature sending unit. They set fan speed from 60 to 100 percent, depending on the built-in thermostat's setting. The thermostats have a range of 160 to 220 degrees F. The variable speed controllers allow greater control over engine temperature, which helps to reduce charging spikes and current load on the charging system. They will keep the fans running for 30 seconds after your vehicle is turned off.

4.62 out of 5 stars ( 26 )

$149.99

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$204.99

Painless Performance FAN-THOM II Electric Fan Relay Kits

These FAN-THOM II electric fan relay kits come with a threaded thermostat that screws into the engine block or intake manifold for a clean and professional look. These kits provide protection for your electric fans and wire harnesses. They supply constant voltage, protect against voltage and amperage spikes, and prevent the fan from back-feeding voltage through your vehicle's wire harnesses. These kits include: * SPST 40 amp relay * 30 amp circuit breaker * Thermostatic switch * Relay base with harness * Crimp-on terminals * Mounting hardware

4.57 out of 5 stars ( 82 )

$55.99

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$76.99

Painless Performance Temperature Sending Units

Painless Performance temperature sending units are designed to allow your electric fan to turn on and off at a desired temperature. These switches are recommended for all electric fan installations and are available in several different temperature ranges. These Painless Performance temperature sending units are sure to keep your engine cool and running at the temperature range of your choice.

3.81 out of 5 stars ( 88 )

$38.99

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$55.99

Proform Adjustable Electric Fan Controllers

Proform adjustable fan controllers make it easy to turn your vehicle's electric fan into a thermostat-controlled cooling accessory! They're available with push-in or thread-in probes which install between the fins of your radiator. Just set the temperature (between 150 and 240 degrees F) that you want to activate the fan. These premium kits include all necessary wires, hardware, and terminals for installation. Proform fan controllers are approved for both street and racing applications.

4.24 out of 5 stars ( 42 )

$55.99

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$124.99

Flex-A-Lite Adjustable Electric Fan Controllers

Flex-A-Lite adjustable electric fan controllers are dial-adjustable from 160 to 240 degrees F. They feature a stainless steel probe sensor that inserts between your radiator's fins. They give you the freedom to set one temperature for occasional high-demand use, and then reset the temperature for highway or day-to-day driving.

4.59 out of 5 stars ( 17 )

$51.99

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$149.99

Cooling Components 2-Speed Fan Controllers

Cooling Components 2-speed fan controllers are smart systems offering many advantages over the old school use of relays and temperature sending units. You have the choice of three temperature settings (184/195/205) based on your engine thermostat. They monitor your engine coolant behavior and set the fan start up accordingly, for instance if your engine warms up rapidly the fan would also start sooner. Cooling Components 2-speed fan controllers are weatherproof, so they can be installed anywhere, and installation is way easier than the relay systems. Additional benefits and notes: * Modern, high-quality, all-solid state design * Easy to mount; temperature sensor mounts under thermostat housing bolt * Controls one or two fans/speed * 30+ amp continuous load, 80 amp startup surge * Choice of three temperature settings (185/195/205 degrees) * Sensors to conform with your engine thermostat * A/C request, the fan turns on upon A/C request through a trinary switch * Detects temperature sensor faults, turns on fan for fail-safe operation * Weather-resistant design allows mounting inside or outside the vehicle cabin * Reverse battery, short circuit, and overload protection * 10-32 studs for solid high-current connections * Super compact size, measures only 3.7 in. x 2.6 in. x 1 in.

4.33 out of 5 stars ( 3 )

$250.99

Derale Deluxe Adjustable Controllers with Pipe Threaded Probes

Derale deluxe adjustable fan controllers with pipe-threaded probes are installed in water jackets in the intake manifold or engine block. They allow fan activation to adjust between 150 and 240 degrees F. These fan controllers are suitable for race and street rod applications. For underhood cooling components, trust the expertise of Derale Performance.

4.25 out of 5 stars ( 116 )

$94.99

Derale Single-Stage Fan Controllers

Derale single-stage fan controllers can be installed in the radiator or a threaded location. They activate fans at a specific temperature and turn them off at a preset temperature. The controllers are available for single or dual fans, and specific types will work on vehicles equipped with air conditioning. For top-quality underhood cooling accessories, trust the expertise of Derale Performance.

3.59 out of 5 stars ( 116 )

$27.56

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$54.44

Be Cool Electric Fan Sending Units

Be Cool electric fan sending units are replacement senders for Be Cool electric fan wiring harness kits. The sensors install in water jackets in your intake manifold or engine block and are available in either 185 or 195 degree sending units.

2.33 out of 5 stars ( 3 )

$79.99

Mishimoto Electric Fan Controller Kits

Mishimoto electric fan controller kits are applicable for any vehicle with a 12 V electric fan—and they have an adjustable activation temperature from 150 to 240 degrees F. The thermal switches are designed for use with one or two electric fans drawing a combined 25 amps or less, and have a built-in A/C override feature. Kit includes: * Probe or 1/8 in. NPT-style temperature sensor to fit your needs * 7 ft. of wire for installation in nearly any size vehicle * Wiring connectors and hardware for installation

4.48 out of 5 stars ( 33 )

$88.95

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$235.99

Hayden Electric Fan Controls

Make sure that your cooling fans turn off and on with Hayden electric fan control kits. These Hayden automotive electric fan kits are designed to allow your electric fan to turn off and on at certain temperatures. Hayden offers these electric fan kits for single or dual fan applications. All of these Hayden electric fan kits are compatible with their own fans and original equipment cooling fans. They include all necessary wiring, relays, circuit breakers, sending units, hardware for installation, and detailed instructions.

3.92 out of 5 stars ( 197 )

$30.99

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$44.99