19.56 EUR
VEMO V25-99-1720 Switches
Colour: red Combi switch Function: lock Number of connectors: 4Switch: with Double thermal switch Switch point [°C]: 100; 90
Stores where to buy this product
Trodo EU
VEMO V25-99-1720 Switches
The VEMO V25-99-1720 is a high‑performance temperature switch designed to control the operation of radiator fans in automotive and industrial applications. Its compact size, robust construction, and precise operating characteristics make it an ideal choice for maintaining optimal engine temperatures while ensuring energy efficiency.
Core Functionality
This device functions as a thermal relay, automatically energizing the radiator fan when the coolant temperature rises above a predetermined threshold. Once the coolant cools below that set point, the switch de‑energizes the fan, preventing unnecessary operation and reducing electrical load.
Key Technical Specifications
- Operating Voltage: 12 V DC (standard automotive battery voltage)
- Current Rating: Up to 10 A continuous, ensuring reliable operation with high‑capacity fans.
- Temperature Range: -40 °C to +125 °C, suitable for harsh automotive environments.
- Operating Temperature Threshold: Adjustable from 70 °C to 120 °C in 5 °C increments via a simple screw adjustment.
- Physical Dimensions: M22 x 1.5 mm mounting hole, body length 25 mm, width 18 mm, height 12 mm.
- Mounting Type: Screw‑in with a single threaded hole for secure attachment to engine blocks or fan housings.
- Material Composition: High‑temperature resistant plastic housing with metal contacts for durability and low resistance.
Design Features
The V25-99-1720 incorporates a thermally activated bimetallic strip that bends when heated, closing the electrical circuit. This mechanical action eliminates the need for electronic components, resulting in lower cost and higher reliability under vibration and shock conditions typical of automotive engines.
The switch’s housing is engineered to withstand repeated thermal cycling without degradation, ensuring a service life exceeding 10 000 operating cycles. The metal contacts are plated with gold to resist corrosion and maintain low contact resistance over time.
Installation Guidelines
Installing the VEMO V25-99-1720 is straightforward:
- Locate a suitable mounting point on the engine block or fan housing that allows the switch to be positioned close to the coolant temperature source.
- Screw the switch in place using a standard M22 x 1.5 mm bolt, ensuring a tight fit to prevent vibration loosening.
- Connect the fan wiring between the switch terminals and the radiator fan motor. Use insulated wire rated for automotive temperatures.
- Adjust the temperature threshold by turning the adjustment screw until the desired operating point is achieved.
- Test the system by heating the engine to verify that the fan activates at the set temperature and deactivates upon cooling.
Compatibility with Vehicle Models
The V25-99-1720 is widely used in a range of Ford models, including:
- Ford Escort (5th generation)
- Ford Mondeo (1st generation)
- Other Ford and Vauxhall vehicles equipped with standard radiator fan assemblies.
Its universal mounting size and voltage compatibility make it suitable for aftermarket installations in non‑Ford vehicles as well, provided the engine cooling system operates within the specified temperature range.
Operational Benefits
- Energy Efficiency: The fan runs only when necessary, reducing electrical load and improving overall vehicle efficiency.
- Engine Protection: By preventing overheating, the switch helps safeguard critical engine components such as pistons, valves, and head gaskets.
- Simplified Maintenance: The mechanical design requires no calibration or electronic diagnostics, making field service quick and inexpensive.
- Reliability Under Vibration: The robust construction resists loosening and wear even in high‑vibration environments typical of automotive engines.
Troubleshooting Common Issues
If the fan does not activate or deactivates prematurely, consider the following checks:
- Verify that the switch is correctly mounted and securely fastened.
- Check the wiring connections for continuity and proper polarity.
- Ensure the temperature threshold adjustment screw is set to an appropriate value; a misadjusted screw can cause incorrect operation.
- Inspect the bimetallic strip for signs of damage or excessive wear. Replace if necessary.
Maintenance Recommendations
Routine inspection every 12 months is advised:
- Clean the housing and contacts with a soft brush to remove dust and debris.
- Inspect for cracks or deformation in the plastic body, which could indicate thermal stress.
- Confirm that the adjustment screw remains tight; vibration can loosen it over time.
Conclusion
The VEMO V25-99-1720 Switches represent a blend of simplicity, durability, and precise thermal control. Whether installed in classic Ford models or modern vehicles requiring reliable radiator fan operation, this temperature switch delivers dependable performance while contributing to engine longevity and vehicle efficiency.
| This product in Comparor | |
|---|---|
|
Category
This product is cataloged in our store in these categories
|
|
|
International
Find this product in one of our international stores
|
 27.51 EUR  23.28 EUR  18.25 EUR |
| Colors
Predominant colors of the product |
|
| Identifiers | |
| Brand |  Vemo is a brand that specializes in making watches. They make a wide variety of watches, from sporty to dressy, and everything in between. Their watches are known for their high quality and stylish designs. |
| Model | Vemo V25-99-1720 |
| MPN | Vemo V25-99-1720 |
| ID | 7132360 |
| Dimensions / Weight | |
| Key Features | |
Related articles
