VEMO V25-99-1718 Switches

VEMO V25-99-1718 Switches

The VEMO V25-99-1718 is a precision-engineered temperature switch designed to control radiator fan operation in automotive applications. It delivers reliable performance across a wide range of operating temperatures, ensuring optimal cooling for engines while protecting electrical components from overheating.

Key Functional Characteristics

• Operating Temperature Range: The switch is calibrated to activate at specific temperature thresholds, typically around 100 °C to 110 °C, and deactivates near 90 °C to 95 °C. This hysteresis prevents rapid cycling of the fan.
• Electrical Ratings: Rated for a maximum current of 10 A at 12 V DC, making it suitable for standard automotive power supplies.
• Connection Type: M22 x 1.5 threaded mounting with an integrated sealing ring, ensuring secure attachment and protection against moisture ingress.
• Construction Material: High-grade plastic housing combined with a robust metal contact assembly to withstand vibration and thermal expansion.

Design Features for Automotive Use

The VEMO V25-99-1718 incorporates several design elements that make it ideal for use in vehicle cooling systems:

• Compact Footprint: Its small size allows installation in tight engine bay spaces without interfering with other components.
• Sealed Interface: The sealing ring prevents coolant or oil from reaching the electrical contacts, reducing corrosion risk.
• Quick-Release Mounting: M22 threading enables fast assembly and maintenance, which is crucial for service technicians.

Compatibility with Vehicle Models

The VEMO V25-99-1718 is specifically engineered to fit a range of Ford models, including but not limited to:

• Ford Escort
• Ford Fiesta (various generations)
• Ford Scorpio
• Ford Transit
• Ford Sierra

Its standardized mounting dimensions and electrical specifications allow seamless integration into the existing cooling fan control circuits of these vehicles.

Installation Guidelines

1. Disconnect Power: Ensure the vehicle’s battery is disconnected to avoid accidental short circuits during installation.
2. Remove Existing Switch: Unscrew the current temperature switch from the radiator fan housing, noting the orientation of the wiring harness.
3. Mount the V25-99-1718: Align the M22 threads with the mounting holes on the fan housing and tighten securely. The sealing ring should be positioned to contact the housing surface for optimal protection.
4. Reconnect Wiring: Attach the wiring harness to the switch terminals, ensuring correct polarity and secure connections.
5. Reapply Power: Reconnect the battery and test the fan operation by allowing the engine to reach operating temperature. The fan should engage at the designated threshold and disengage as temperatures fall.

Performance Benefits

By employing the VEMO V25-99-1718, vehicle owners can expect:

• Enhanced Engine Protection: The switch prevents overheating by activating the radiator fan precisely when needed.
• Reduced Electrical Load: Efficient fan control minimizes unnecessary power draw, contributing to overall fuel economy.
• Longevity: Durable construction and sealed contacts extend the lifespan of both the switch and associated electrical components.

Maintenance Tips

• Periodically inspect the sealing ring for wear or damage; replace if compromised to maintain moisture protection.
• Check wiring connections for corrosion or looseness, tightening as necessary.
• Verify fan operation during routine engine checks to ensure the switch remains responsive.

Conclusion

The VEMO V25-99-1718 Switches represent a reliable, high-quality solution for radiator fan control in a variety of Ford vehicles. Its precise temperature thresholds, robust construction, and ease of installation make it an essential component for maintaining optimal engine cooling performance.