Four Seasons 37520 Engine Cooling Fan Controller
OE Quality 60-Day Returns
Four Seasons
 Rad Fan Controller

Four Seasons 37520 Engine Cooling Fan Controller

Brand Four Seasons 37520
Amperage Rating 30
Bracket? No
Cover Color Black
Description Relays
Meets / Exceeds OEM? Yes
Skirt? No
Style Radiator Fan Controller
Terminal Gender Female
Terminal Quantity 24
Terminal Type Pin
Type Radiator Fan Controller
Voltage 12
Product line Rad Fan Controller
Fits Ford · 16 vehicles

OE direct replacement. Meets OEM requirements for a straightforward swap.

Radiator fan controller. Manages fan operation with a 12-volt, 30-amp design.

Pin terminals. Female connections help simplify wiring integration.

Cross-references Febi-Bilstein 37520, Four Seasons 20266 and 1R1586 for the same application. See all 9.

$122.82Free shipping
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Four Seasons Rad Fan Controller 37520

Four Seasons 37520 is a 12-volt radiator fan controller built for OE-style replacement on select Ford Escort applications. It uses a 24-pin female terminal layout, a black cover, and a 30-amp amperage rating to support radiator fan relay control in the cooling system.

Key Features

  • Radiator fan controller for engine cooling system control
  • 12-volt design with 30-amp amperage rating
  • 24-pin female terminal configuration
  • Black cover color
  • Meets or exceeds OEM requirements
  • Four Seasons Rad Fan Controller line

Product Details

The Four Seasons Rad Fan Controller line focuses on direct-fit cooling system control components for vehicles that rely on accurate radiator fan operation. Part number 37520 is an OE replacement fan controller for 1998-2001 Ford Escort and 2002-2003 Ford Escort models, helping maintain proper fan relay function when the original controller is no longer operating correctly. This part cross-references Ford OE numbers such as 3S4Z12B577AA and F8CZ12B577AA for the same application.

Compatible With 1998-2001 Ford Escort and 2002-2003 Ford Escort, this radiator fan controller is a practical replacement for cooling system electrical faults. Four Seasons 37520 is also referenced by Febi-Bilstein 37520 and Four Seasons 20266.

Common Issues This Part Can Address

  • Radiator fan not switching on at the correct temperature
  • Cooling fan relay control failure
  • Intermittent fan operation
  • Overheating caused by poor fan control
  • Electrical connector or controller replacement needs on Ford Escort cooling systems

Installation Notes and Tips

Verify the terminal count, terminal gender, amperage rating, and connector style against the original unit before installation. Confirm the vehicle application by year and model, and inspect the cooling fan circuit, relay path, and related wiring for damage before replacing the controller. Fits 1998-2001 Ford Escort and 2002-2003 Ford Escort, N/A.

Quality Assurance

This Four Seasons radiator fan controller meets or exceeds OEM requirements for the listed applications, supporting a direct replacement approach for factory-style cooling system control.

This part fits 16 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodel# DoorsLitersCylindersPositionNotes
2003FordEscort—2 Door2.0LL4N/AOE Replacement Fan Controller; Rad Fan Controller
2002FordEscort—2 Door2.0LL4N/AOE Replacement Fan Controller; Rad Fan Controller
2001FordEscort——2.0LL4N/AController Relay; Rad Fan Controller
2001FordEscortZX2—2.0LL4N/AController Relay; Rad Fan Controller
2000FordEscort——2.0LL4N/AController Relay; Rad Fan Controller
2000FordEscortZX2—2.0LL4N/AController Relay; Rad Fan Controller
2000FordEscortZX2 S/R—2.0LL4N/AController Relay; Rad Fan Controller
1999FordEscortZX2 Cool Coupe—2.0LL4N/AController Relay; Rad Fan Controller
1999FordEscortZX2 Hot Coupe—2.0LL4N/AController Relay; Rad Fan Controller
1999FordEscortZX2 S/R—2.0LL4N/AController Relay; Rad Fan Controller
1999FordEscortZX2 Equi—2.0LL4N/AController Relay; Rad Fan Controller
1999FordEscortZX2 Tipico—2.0LL4N/AController Relay; Rad Fan Controller
1998FordEscortZX2 Cool Coupe—2.0LL4N/AController Relay; Rad Fan Controller
1998FordEscortZX2 Hot Coupe—2.0LL4N/AController Relay; Rad Fan Controller
1998FordEscortZX2 Equi—2.0LL4N/AController Relay; Rad Fan Controller
1998FordEscortZX2 Tipico—2.0LL4N/AController Relay; Rad Fan Controller
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Febi-Bilstein — 37520Four Seasons — 202661R15863S4Z12B577AA207220A07220F8CZ12B577AAF8CZ12B577ABF8CZ12B577AC