Racing Cooling System Switches, Sensors & Relays
- Painless Performance®Adjustable Electric Fan ThermostatAdjustable Electric Fan Thermostat by Painless Performance®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement...High quality at an affordable priceBuilt to match your exact requirements$54.99 - $86.99
- Derale Performance®Adjustable Electric Fan ControllerAdjustable Electric Fan Controller by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has never compromised on the...Adjustable turn-on temperature from 150-240 Degree FTurn-off temperature is preset at 10 Degree F below turn-on temperature$69.29
- Derale Performance®Fan Controller ProbeFan Controller Probe by Derale Performance®. Electric Fan Probe Perfect for your vehicle. This product features premium quality and will perform better than advertised. Derale Performance has never compromised on the quality and neither...Developed to enhance your driving experienceEnsures impeccable quality and great durability$12.27 - $20.99
- Derale Performance®Fan Switch Relay KitFan Switch Relay Kit by Derale Performance®. Derale Performance has never compromised on the quality and neither should you. It crafted this product to the strictest industry requirements with the use of first-rate materials to ensure...Fits into either a 3/8" NPT or 1/8" NPT port3/8" NPT x 1/8" NPT bushing included$36.74
- Derale Performance®Fan Switch ThermostatFan Switch Thermostat by Derale Performance®. Derale Performance has never compromised on the quality and neither should you. It crafted this product to the strictest industry requirements with the use of first-rate materials to ensure...Fits into either a 3/8" NPT or 1/8" NPT port3/8" NPT x 1/8" NPT bushing included$31.49
- Derale Performance®High Amperage Adjustable Dual Electric Fan ControllerHigh Amperage Adjustable Dual Electric Fan Controller by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has never...Adjustable turn-on temperature from 150-240 Degree FRated at a maximum 35 amps per fan$146.99
- Derale Performance®High Amperage Adjustable Single Electric Fan ControllerHigh Amperage Adjustable Single Electric Fan Controller by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has...Adjustable turn-on temperature from 150-240 Degree FRated at a maximum 35 amps$115.49
- Derale Performance®Premium Single Stage 180 Degree F Fan ControllerPremium Single Stage 180 Degree F Fan Controller by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has never...180 Degree F preset turn-on temperatureTurn-off temperature is preset at 165 Degree F$36.74
- Painless Performance®Adjustable Electric Fan ThermostatAdjustable Electric Fan Thermostat by Painless Performance®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement...High quality at an affordable priceBuilt to match your exact requirements$54.99 - $86.99
- Painless Performance®Dual Fan-Dual Activation Fan Relay KitDual Fan-Dual Activation Fan Relay Kit by Painless Performance®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient...High quality at an affordable priceBuilt to match your exact requirements$119.99 - $125.99
- Painless Performance®Dual Fan-Dual Activation Fan Relay KitDual Fan-Dual Activation Fan Relay Kit by Painless Performance®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient...High quality at an affordable priceBuilt to match your exact requirements$119.99 - $125.99
- Painless Performance®Fan Relay with Thermostatic SwitchFan Relay with Thermostatic Switch by Painless Performance®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement...High quality at an affordable priceBuilt to match your exact requirements$46.99 - $49.99
- Painless Performance®Fan Relay with Thermostatic SwitchFan Relay with Thermostatic Switch by Painless Performance®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement...High quality at an affordable priceBuilt to match your exact requirements$46.99 - $49.99
- Racing Power Company®Adjustable Electric Fan Controller Kit (R3106)Adjustable Electric Fan Controller Kit by Racing Power Company®. Crafted with expertise and care, this product sports the elaborate design and features unsurpassed quality. It is made using smart materials and leading technological...One-of-a-kind style will help customize your autoWill deliver unparalleled levels of durability$42.29
- Derale Performance®Adjustable Electric Fan Controller (16759)Adjustable Electric Fan Controller (16759) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has never...Adjustable turn-on temperature from 150-240 Degree FTurn-off temperature is preset at 10 Degree F below turn-on temperature$69.29
- Painless Performance®Dual Fan-Dual Activation Fan Relay Kit (30117)Dual Fan-Dual Activation Fan Relay Kit (30117) by Painless Performance®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient...High quality at an affordable priceBuilt to match your exact requirements$119.99
- Derale Performance®High Amperage Adjustable Single Electric Fan Controller (16779)High Amperage Adjustable Single Electric Fan Controller (16779) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance...Adjustable turn-on temperature from 150-240 Degree FRated at a maximum 35 amps$115.49
- Derale Performance®Adjustable Electric Fan Controller (16749)Adjustable Electric Fan Controller (16749) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has never...Adjustable turn-on temperature from 150-240 Degree FTurn-off temperature is preset at 10 Degree F below turn-on temperature$69.29
- Derale Performance®Adjustable Electric Mechanical Fan Controller (16769)Adjustable Electric Mechanical Fan Controller by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has never...Adjustable turn-on temperature from 32-240 Degree FTurn-off temperature is preset at 10 Degree F below turn-on temperature$38.84
- Derale Performance®Dual Relay Wire Harness Kit (16765)Dual Relay Wire Harness Kit by Derale Performance®. This Electric Fans Accessories make with accuracy and functionality in mind which give prominent productivity and easy use. That give you ultimate satisfaction. Derale Performance has...Rated at maximum 25 amp continuous draw per each relay 50 amp totalComplete with wiring harnesses and inline 30 amp fuses$37.26
- Derale Performance®Fan Switch Relay Kit (16720)Fan Switch Relay Kit (16720) by Derale Performance®. Derale Performance has never compromised on the quality and neither should you. It crafted this product to the strictest industry requirements with the use of first-rate materials to...Single stage fan controller with 180 Degree F turn-on temperatureTurn-off temperature is preset at 165 Degree F$36.74
- Derale Performance®Fan Switch Thermostat (16731)Fan Switch Thermostat (16731) by Derale Performance®. Derale Performance has never compromised on the quality and neither should you. It crafted this product to the strictest industry requirements with the use of first-rate materials to...Single stage fan control thermostat with 190 Degree F turn-on temperatureTurn-off temperature is preset at 175 Degree F$31.49
- Derale Performance®Fan Switch Thermostat (16730)Fan Switch Thermostat (16730) by Derale Performance®. Derale Performance has never compromised on the quality and neither should you. It crafted this product to the strictest industry requirements with the use of first-rate materials to...Single stage fan control thermostat with 180 Degree F turn-on temperatureTurn-off temperature is preset at 165 Degree F$31.49
- Derale Performance®High Amperage Adjustable Dual Electric Fan Controller (16789)High Amperage Adjustable Dual Electric Fan Controller (16789) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance...Adjustable turn-on temperature from 150-240 Degree FRated at a maximum 35 amps per fan$146.99
- Derale Performance®High Amperage Adjustable Dual Electric Fan Controller (16788)High Amperage Adjustable Dual Electric Fan Controller (16788) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance...Adjustable turn-on temperature from 150-240 Degree FRated at a maximum 35 amps per fan$146.99
- Derale Performance®High Amperage Adjustable Single Electric Fan Controller (16778)High Amperage Adjustable Single Electric Fan Controller (16778) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance...Adjustable turn-on temperature from 150-240 Degree FRated at a maximum 35 amps$115.49
- Derale Performance®Premium Single Stage 180 Degree F Dual-Probe Fan Controller (16735)Premium Single Stage 180 Degree F Dual-Probe Fan Controller by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has...180 Degree F preset turn-on temperatureTurn-off temperature is preset at 165 Degree F$39.89
- Derale Performance®Premium Single Stage 180 Degree F Fan Controller (16739)Premium Single Stage 180 Degree F Fan Controller (16739) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has...180 Degree F preset turn-on temperatureTurn-off temperature is preset at 165 Degree F$36.74
- Derale Performance®Premium Single Stage 180 Degree F Fan Controller (16738)Premium Single Stage 180 Degree F Fan Controller (16738) by Derale Performance®. Designed with quality and performance in mind, this Fan Controller breaks new ground in the industry of electric fan controllers. Derale Performance has...180 Degree F preset turn-on temperatureTurn-off temperature is preset at 165 Degree F$36.74
- Intellitronix®Variable Speed Fan Controller (N4001)Variable Speed Fan Controller by Intellitronix®.Perfect for drag racing or high-performance racing applicationsRobust and long-lasting construction$153.95
An internal combustion engine provides optimum performance and fuel consumption when operating within a narrow temperature range between 195 and 220 degrees of Fahrenheit, whereas, some racing engines can run even hotter. If the temperature goes down, the engine will lose its efficiency and, vise versa, a higher temperature may cause damage to the motor. To keep this under control is the job of the engine cooling system, which relies on different sensors to continuously monitor the temperature of the engine, and uses different switches and relays to operate the cooling fan and indicate the driver if the motor runs out of its normal temperature range.
Whether it is a gasoline or diesel engine, it has at least one sensor that measures the temperature of the engine. This sensor is called an engine coolant temperature sensor and is usually cut into the engine block. It determines the coolant temperature and sends the data to the control module. The ECU analyzes them and based on the engine temperature adjusts ignition timing and fuel injection if necessary, as well as activates the radiator fan if the engine is getting too hot. The information received from the sensor is also used to operate the temperature gauge on the dashboard, allowing the driver to visually monitor the temperature of the engine.
When the engine gets too hot, the ECU starts the cooling fan. In order to avoid a short circuit and damage to the control unit, the fan is operated via a relay. Those vehicles that do not have an ECU use an engine cooling fan switch to start the fan. This switch is cut into the radiator and is activated when the temperature of the coolant that flows through the radiator reaches a specific threshold. As soon as the antifreeze cools down to a specific predetermined level, the engine cooling fan switch breaks the circuit. It does not rely on the engine coolant temperature sensor, so it will work even if the sensor fails.