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The Best Automotive Thermostat Switch 12V of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Automotive Thermostat Switch 12V of 2022. Check our ranking below.

2,519 (random num) Reviews Scanned

Rank No. #1
Fan Thermostat Temperature Switch 3/8" 185 Degree On 170 Degree Off Electric Cooling Engine Fan Thermostat for 10" 12" 14" 16" Fan
  • This cooling fan fan thermostat temperature switch activates your fan when the temperature reaches 185 degrees and turns off at approximately 175 degrees. Perfect fits for any of 10, 12, 14, and 16 inch fans including dual fans
  • Compatible for 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351W 347 352 360 390 406 427 428 429 460 351C 351M 400M 273 318 340 360 361 383 400 413 426W 440 455 330 326 engines
  • 170-185 degree electric fan thermostat relay switch kit for your cooling system, It is a NPT 3/8" thread
  • Electric fan switch temp switch made of durable aluminum, ensure maximum strength and durability for long lasting usage
  • Please carefully check your vehicle model before purchase. If you have any problems with the fan thermostat temperature switch please reach out to us anytime
Rank No. #2
American Volt 32-248'F Dial Adjustable Electric Radiator Cooling Fan Thermostat Controller Switch Universal 12 Volt Water Coolant Temperature Hose Probe Kit for Automotive Cars Trucks RVs
  • Dial adjustable electric radiator fan thermostat controller temperature sensor.
  • Probe measures liquid or contact temperature and passes power to the fan.
  • Flexible turn on-off temperature control range of 32-248'F degrees or 0-120'C.
  • 3-pin allows thermostat to be wired as normally open or normally closed circuit.
  • Probe is mounted between the radiator fins or inside radiator or oil cooler hose.
Rank No. #3
WWZMDiB 12v Thermostat Switch with Waterproof Probe 10A 120W -50℃ to 110℃ 12v Temperature Controller(3pcs)
  • 12v temperature controller: Each temperature control switch is equipped with a 1 meter/3.28 feet long waterproof stainless steel probe
  • Power supply voltage: 12V 10A 120W
  • Temperature control range: -50℃~110℃
  • Temperature control accuracy: 0.1℃
  • Widely used in incubation areas, hatching areas, equipment chassis, air conditioning systems, temperature control protection, cabinet cooling systems and other fields
Rank No. #4
American Volt Electric Fan Push-in Radiator Fin Brass Probe Thermostat Temperature Switch Sensor Kit (4-Pack, 180'F On - 165'F Off)
  • Automotive electric fan push-in radiator fin probe thermostat switch.
  • Closes electrical circuit at turn-on temperature and activates 12V fan.
  • Solid brass fin probe can be cut or bent to suit any project needs.
  • Measures liquid coolant, oil, or water temperatures accurately.
  • Kit is universal to fit any car, truck, radiator or trans oil cooler.
Rank No. #5
FAERSI Fan Thermostat Temperature Switch 185 to 175 Degree Electric Engine Cooling Temperature Sensor Switch with 3/8" Pipe Thread for 10" 12" 14" 16" Fan
  • 【COMPATIBLE ENGINES】: 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351W 347 352 360 390 406 427 428 429 460 351C 351M 400M 273 318 340 360 361 383 400 413 426W 440 455 330 326 engines
  • 【Ease of use】185-175 degree electric fan thermostat relay switch kit for your cooling system, sending Unit Thread Size: 3/8, Spanner Size:17, Fits for any of 10, 12, 14, and 16 inch fans including dual fans
  • 【Premium Quality】This Ac Fan Switch Radiator is anti-corrosion and very durable in using, ensure maximum strength and durability for long lasting usage.
  • 【WORKING】This kit is set up to turn your electric engine cooling fan on at 185 degrees and shut off at 175 degrees. Comes with hexagonal nut, Direct replacement part for original blower motor resistor.
  • 【NOTE】Every product must take inspected and tested multiple times before the shipment, if you get any problems with our this Electric Cooling Fan Thermostat Kit, please contact us in the first time.we can provide free replacement or refund.
Rank No. #6
Awozkcd UL/CUL KSD301 Shutoff Thermostat,40°C/104°F On and 30°C/86°F Off,Close on Rise,Normally Open N.O Bimetal Snap Disc 125V 16A Auto Reset Thermal Switch,2 pcs
  • 1.Reliable Quality :The thermal control switch made of EMS bimetal disc from USA . Large capacity contacts with a diameter of 3.5mm.UL&CUL approval(E527363).Precise temperature control and durable;
  • 2.Wide Operating Voltage : KSD301 thermo switch work as well with AC or DC voltage, such as AC110V/120V/125V/16A;250V10A/250V16A;DC12V/24V/15A;48V/10A;
  • 3.Action Type: N.O (Normally Open): The original state of the thermal cutoff switches contact is normally open. 40°C/104°F On and 30°C/86°F (+/- 3°C) off;
  • 4.Easy to Install and Save Money: The thermostatic switch with stainless steel movable flange and easy to install. Enjoy the DIY, you can do it;
  • 5.Wide Applications: Replaces most fixed snap action thermostats on heating equipment and appliances.Such as: refrigerator,fireplace,wall heater,wood stove,green house,electric box control cabinet, High temperature starting refrigeration fan, camera,street lamp,transformer box,high temperature alarm, etc;
SaleRank No. #7
Digital LED Temperature Controller Module, XH-W3001 Thermostat Switch with Waterproof Probe, Programmable Heating Cooling Thermostat (12V 10A 120W)
  • ✹✹ LED Indicator Light: Display the current output status; Digital Display Tube: Shows measuring temperature, high accuracy of temperature measuring and controlling.
  • ✹✹ Two Work Mode: Heating ( start temperature is less than stop temperature), Cooling ( start temperature is above than stop temperature). Range from -50℃ to 110℃. High temperature control precision of 0.1℃.
  • ✹✹ ABS flame retardant housing is avirulent and environmental protective. High safety, ageing resistant, sturdy and durable.
  • ✹✹ 1 meter NTC10K probe is equipped with it in convenient usage. The Probe used stainless steel material, waterproof and does not rust easily.
  • ✹✹ Widely used in the hatching area, incubation, equipment case, air conditioning system, temperature control protection, cabinet cooling system and other fields. [✹✹ Notice: You can download the E-manual below the pictures. If you meet any qestions, you can contact us and we will give you a satisfied solution!!!]
SaleRank No. #8
X AUTOHAUX 12V Electric Radiator Fan Thermostat Controller Kit Liquid Expansion Temperature Control Switch for Car
  • Dimension: Voltage: 12V; Probe length: 7.4cm/2.91"; Pin Number: 3; Thread Size: M4x0.75; Temperature range: 40-240 Fahrenheit scale (0-120 Degree Celsius).
  • Feature: The thermostat dial has Celsius and Fahrenheit temperature markings to make the set up more convenient.
  • Using: The probe can be mounted in a radiator inlet tube so that remains positioned in the hose.
  • Material: Made of good material, which is durable, portable for long time use.
  • Package Includes: 1 x Fan Thermostat Controller, 1 x Mounting Bracket, 2 x Female Connectors, 6 x Screws.
Rank No. #9
HOPESPANNER 12V Electric Radiator Fan Thermostat Controller Kit Liquid Expansion Temperature Control Switch for Car Vehicle Components
  • Durable: Dimension: Voltage: 12V; Probe length: 7.4cm/2.91"; Pin Number: 3; Thread Size: M4x0.75; Temperature range: 40-240 Fahrenheit scale (0-120 Degree Celsius).
  • Inimitable: Feature: The thermostat dial has Celsius and Fahrenheit temperature markings to make the set up more convenient.
  • Stable: Using: The probe can be mounted in a radiator inlet tube so that remains positioned in the hose.
  • Adaptable: Material: Made of good material, which is durable, portable for long time use.
  • Compatible: Package Includes: 1 x Fan Thermostat Controller, 1 x Mounting Bracket, 2 x Female Connectors, 6 x Screws.
Rank No. #10
Ronybuy Electric Fan Relay Kit 40 AMP Automotive Relay Thermostat Switch Kit for Radiators Fans Temperature Sensor Switch 185 On 175 Off, Waterproof 12V Electric Cooling Fan Relay Switch Wiring Kit
  • 【Compatibility】The 40 AMP waterproof electric radiator fan relay kit fits 10,12,14,16 inch cooling fans. Fit for engines 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351W 347 352 360 390 406 427 428 429 460 351C 351M 400M 273 318 340 360 361 383 400 413 426W 440 455 330 326 351M 400M 273 318 340 360 361 383 400 413 426W
  • 【Easy Installation】Just follow the wiring diagram to wire your electric radiator cooling fans relay kit. RED to 12VDC Positive Battery Terminal, COFFEE to Fan Positive, BLACK to Ignition, GREY to Sending Unit.
  • 【Specifications】This electric fan relay wiring kit is 40 AMP and 12V. The thermostat swtich is 3/8" NPT pipe thread with 1/2" adapter included, it turns on at 185 and off at 175 Degrees. The relay is waterproof and can work in any harsh conditions.
  • 【Package Include】Includes everything you need: 1x 40A relay with harness;1x 3/8" thermostat switch;1x 3/8" to 1/2" adapter;1x inline fuse holder;1x 20 Amp fuse;2x wire connectors;4x ring terminals;1x wiring diagram
  • 【Important】The thermostat MUST be grounded through the threads to the engine in order for it to work, and the engine MUST be grounded. If you mount high-profile fans, be sure to crimp or solder bigger wires to it since the 14AWG wires (15 amps) are not big enough for high amps draw.

Last update on 2025-03-24 / Affiliate links / Images from Amazon Product Advertising API

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