VEMO Temperature Switch, radiator fan V15-99-1982

Overview

The VEMO Temperature Switch (Model V15‑99‑1982) is a precision-engineered component designed to regulate the operation of a vehicle’s radiator fan. It serves as an essential safety and efficiency element, ensuring that the engine cooling system functions within optimal temperature ranges.

Key Functions

• Temperature Sensing: Detects coolant temperature with high accuracy.
• Fan Activation: Triggers the radiator fan when temperatures exceed a predefined threshold.
• Fan Deactivation: Turns off the fan once temperatures fall below the set point, conserving energy and reducing noise.

Technical Specifications

Installation Guide

The switch is typically located near the radiator or within the engine bay’s cooling system circuitry. Installation involves:

1. Disconnecting Power: Ensure the vehicle battery is disconnected to prevent accidental short circuits.
2. Removing Old Switch: Unscrew the existing thermostat or temperature switch, noting the wiring configuration.
3. Connecting New Switch: Attach the three terminals to the corresponding wires: one for coolant sensor input, one for fan control output, and a common ground.
4. Securing Mounting Bracket: Fasten the switch using the provided screws or bolts, ensuring it is firmly seated.
5. Reconnecting Power: Restore battery connection and test the system by monitoring fan operation as engine temperature rises.

Testing Procedure

After installation, verify functionality by:

• Starting the engine and allowing it to reach operating temperature.
• Observing whether the radiator fan engages at the expected temperature threshold.
• Checking for any abnormal noises or delayed activation that may indicate a wiring issue.

Benefits of Using VEMO V15‑99‑1982

• Reliability: Manufactured to OEM standards, ensuring long-term durability under harsh automotive conditions.
• Precision Control: Maintains engine temperature within safe limits, preventing overheating and potential damage.
• Energy Efficiency: Activates the fan only when necessary, reducing electrical load and improving fuel economy.
• Ease of Replacement: Standardized three‑pole design allows for straightforward swaps with minimal tools.

Maintenance Tips

Although the switch is designed to be maintenance‑free, periodic checks can extend its lifespan:

• Inspect wiring connections for corrosion or loose contacts.
• Clean the housing gently with a dry cloth; avoid abrasive cleaners that could damage seals.
• Verify that the gasket remains intact to prevent moisture ingress.

Compatibility Summary

The VEMO Temperature Switch is engineered for a broad range of vehicles within the Volkswagen Group, including:

• Audi 80 (B4), 100 (C3), 200 (B3), and A6 (C4) models.
• Various engine configurations ranging from 1.6 L to 2.8 L.
• Both sedan and coupe body styles, as well as Quattro all‑wheel drive variants.

Conclusion

The VEMO V15‑99‑1982 Temperature Switch is a critical component that safeguards engine performance by intelligently controlling the radiator fan. Its robust construction, precise temperature regulation, and broad vehicle compatibility make it an indispensable part of any automotive cooling system.