Radiator Fan Switch - CI XEFS276

The CI Radiator Fan Switch (MPN: XEFS276) is a high-quality temperature switch designed to regulat...

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Product Information

Full details

The CI Radiator Fan Switch (XEFS276) is an essential component for automotive enthusiasts and mechanics focused on maintaining optimal engine cooling efficiency. This high-quality thermal switch is designed for reliable vehicle temperature regulation, automatically engaging the radiator fan at 95 degrees Celsius and shutting it off at 90 degrees Celsius. While it offers precise performance, users should verify compatibility with their specific vehicle cooling system and thread size requirements before installation.

All features

Model Part NumberXEFS276
BrandCI

Extended Product Information

FAQs

What is the trigger temperature for this switch?

It switches on at 95 degrees Celsius and shuts off at 90 degrees Celsius.

Does this switch fit all radiators?

No, it is specifically designed for systems requiring an M18 x 1.5 thread. Always verify your radiator port size before purchasing.

What tools do I need for installation?

You will need a 24 mm spanner (wrench) and appropriate coolant handling equipment.

Can I use this on a 12V electrical system?

Yes, this switch is designed for standard automotive 12V electrical cooling systems.

Does the housing color matter?

The brown housing is a design finish by the manufacturer; it does not affect the performance or calibration of the switch.

What should I do if the switch leaks coolant?

Check if the sealing washer was installed properly. If it is, replace the washer; if the housing itself is damaged, the unit should be replaced.

Troubleshooting

Radiator fan fails to activate

Check the wiring harness for continuity and ensure the 2-pin connector is firmly seated. Verify coolant levels are high enough to contact the switch.

Fan runs continuously

The switch may be stuck in the closed position due to failure; test the switch with a multimeter in a controlled hot water bath to confirm it is not cycling correctly.

Pros and Cons

Pros

  • Reliable and consistent temperature trigger points
  • High-quality construction for long-term durability
  • Standardized threading for wide compatibility
  • Secure 2-pin connector prevents connection loosening

Cons

  • Specific to M18 x 1.5 thread requirements
  • Requires professional coolant handling during installation
  • Not compatible with systems requiring non-standard trigger temperatures

Setup, Compatibility & Care

Before installing the CI XEFS276, ensure the engine is completely cool to prevent injury from hot coolant. You will need to drain a portion of your cooling system to avoid spills during the replacement process. Use a 24 mm spanner to securely fasten the switch into the M18 x 1.5 port on your radiator. Ensure the sealing washer is seated correctly to prevent leaks. After installation, top off your coolant levels and check for any moisture around the connection point. Regularly inspect the 2-pin connector for signs of corrosion or melting, as these are common points of failure in aging vehicle electrical systems.

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