HomeBelts and Cooling > SwitchesFour Seasons 37304 Engine Cooling Fan Switch
Part #: 37304

Four Seasons 37304 Engine Cooling Fan Switch

Temperature Switch
⚙️ 48 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Temperature Switch
🚗Fitment: Kia, Ford, Mazda, and Mercury, Sephia, Escort, MX-3, Tracer, Protege, 323, Miata, Probe, 626, MX-6, and RX-7
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Reliable Engine Cooling Fan Switch for Ford, Kia, Mazda, and Mercury

The Four Seasons Temperature Switch 37304 is engineered to maintain optimal engine temperature by controlling the cooling fan operation. Designed for specific Ford, Kia, Mazda, and Mercury models, this engine cooling fan switch ensures precise fan activation and deactivation based on temperature thresholds.

  • Compatible with Ford Escort, Probe, and Tracer models
  • Fits Kia Sephia and Mazda 323, 626, Miata, MX-3, MX-6, RX-7, and Protege
  • Temperature activation at 206°F and deactivation at 197°F
  • Oval-shaped male connector with one terminal for secure electrical connection
  • Engine-mounted installation with 3/8" pipe (43/64" x 18) male fitting thread size
  • Meets or exceeds OEM specifications for reliable performance

Four Seasons Temperature Switch Product Line Overview

The Temperature Switch line by Four Seasons focuses on precision temperature control components for engine cooling systems. This product line includes switches designed to activate cooling fans at specific temperature points, helping to prevent engine overheating and maintain efficient operation. The 37304 switch is part of this line, offering dependable temperature-based fan control for a range of vehicle makes and models.

Detailed Product Description

The Four Seasons 37304 engine cooling fan switch features a temperature-sensitive design that opens the fan circuit at 197°F and closes it at 206°F, ensuring the cooling fan operates only when necessary. Its oval-shaped male connector with a single terminal provides a secure and straightforward electrical connection. The switch mounts directly on the engine using a 3/8" pipe thread, facilitating easy installation and reliable fitment. This switch is compatible with various Ford, Kia, Mazda, and Mercury vehicles, including popular models such as the Ford Escort and Mazda Miata.

Common Applications and Issues Addressed

  • Prevents engine overheating by activating the cooling fan at the correct temperature
  • Resolves intermittent or non-functioning cooling fan problems
  • Replaces faulty or worn temperature switches to restore proper fan control
  • Helps maintain consistent engine temperature for improved performance
  • Supports engine longevity by preventing excessive heat buildup

Installation Notes and Tips

  • Ensure the engine is cool before attempting installation to avoid burns
  • Verify the correct thread size (3/8" pipe) and connector type (oval male) for compatibility
  • Disconnect the battery before removing the old switch to prevent electrical shorts
  • Use appropriate thread sealant if recommended by the vehicle manufacturer
  • Test the switch operation after installation by monitoring fan activation at specified temperatures

Quality Assurance and Warranty

The Four Seasons Temperature Switch 37304 meets or exceeds OEM standards, providing reliable and consistent performance. Manufactured with quality materials and tested for durability, this switch supports proper engine cooling system function. Warranty coverage details should be confirmed with the product documentation or supplier.

BrandFour Seasons
Part Number37304
PositionTemperature Switch
Connector GenderMale
Connector ShapeOval
DescriptionSwitch-Temp /Engine Mount
Fan Open/ClosedOpen
Fitting GenderMale
Fitting Thread Size3/8" Pipe (43/64" x 18)
Meets / Exceeds OEM?YES
Mnt Sys LocEngine Mounted
StyleTemperature
Temperature Off197
Temperature On206
Terminal Quantity1
TypeCooling Fan

This part fits 48 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersPositionNotes
1997KiaSephiaN/AEngine mounted coolant fan switch; Temperature Switch
1996FordEscort1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1996KiaSephiaN/AEngine mounted coolant fan switch; Temperature Switch
1996MazdaMX-3N/ATemperature Switch
1996MercuryTracerManual1.8LL4N/AEngine Mounted; Thermostat Housing; Temperature Switch
1995FordEscort1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1995KiaSephiaN/AEngine mounted coolant fan switch; Temperature Switch
1995MazdaMX-31.6LL4N/ATemperature Switch
1995MazdaProtegeN/AEngine mounted coolant fan switch; Temperature Switch
1995MercuryTracerManual1.8LL4N/AEngine Mounted; Thermostat Housing; Temperature Switch
1994FordEscort1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1994KiaSephiaN/AEngine mounted coolant fan switch; Temperature Switch
1994Mazda323N/AEngine mounted coolant fan switch; Temperature Switch
1994MazdaMX-31.6LL4N/ATemperature Switch
1994MazdaProtegeN/AEngine mounted coolant fan switch; Temperature Switch
1994MercuryTracerManual1.8LL4N/AEngine Mounted; Thermostat Housing; Temperature Switch
1993FordEscortAutomatic1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1993FordEscortManual1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1993Mazda323N/AEngine mounted coolant fan switch; Temperature Switch
1993MazdaMiataN/AEngine mounted coolant fan switch; Temperature Switch
1993MazdaMX-3N/AEngine mounted coolant fan switch; Temperature Switch
1993MazdaProtegeN/AEngine mounted coolant fan switch; Temperature Switch
1993MercuryTracerManual1.8LL4N/AEngine Mounted; Thermostat Housing; Temperature Switch
1992FordEscortAutomatic1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1992FordEscortManual1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1992FordProbeManualN/AEngine mounted coolant fan switch; Temperature Switch
1992Mazda323N/AEngine mounted coolant fan switch; Temperature Switch
1992Mazda626N/AEngine mounted coolant fan switch; Temperature Switch
1992MazdaMiataN/AEngine mounted coolant fan switch; Temperature Switch
1992MazdaMX-3N/AEngine mounted coolant fan switch; Temperature Switch
1992MazdaMX-6N/AEngine mounted coolant fan switch; Temperature Switch
1992MazdaProtegeN/AEngine mounted coolant fan switch; Temperature Switch
1992MercuryTracerManual1.8LL4N/AEngine Mounted; Thermostat Housing; Temperature Switch
1991FordEscortAutomatic1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1991FordEscortManual1.8LL4N/AEngine mounted coolant fan switch; Temperature Switch
1991FordProbeManualN/AEngine mounted coolant fan switch; Temperature Switch
1991Mazda323N/AEngine mounted coolant fan switch; Temperature Switch
1991Mazda626N/AEngine mounted coolant fan switch; Temperature Switch
1991MazdaMiataN/AEngine mounted coolant fan switch; Temperature Switch
1991MazdaMX-6N/AEngine mounted coolant fan switch; Temperature Switch
1991MazdaProtegeN/AEngine mounted coolant fan switch; Temperature Switch
1991MercuryTracerManual1.8LL4N/AEngine Mounted; Thermostat Housing; Temperature Switch
1990FordProbeManualN/AEngine mounted coolant fan switch; Temperature Switch
1990Mazda3231.6LL4N/AEngine mounted coolant fan switch; Temperature Switch
1990Mazda626N/AEngine mounted coolant fan switch; Temperature Switch
1990MazdaMX-6N/AEngine mounted coolant fan switch; Temperature Switch
1990MazdaProtegeN/AEngine mounted coolant fan switch; Temperature Switch
1989MazdaRX-7N/AEngine mounted coolant fan switch; Temperature Switch

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

0N350188400N35018840A1113730415511411918973920370437304601767A77306FO2Z10884CFOZZ10884CMT1372N35018840TU146TU278

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.