The coolant temperature switch is an electronic device that is part of the monitoring and control system of an internal combustion engine. The switch monitors the temperature of the coolant, which is important for the correct operation of a power unit of any design.

1. PASSAT (3A2, 35I)
2. CORRADO (53I)
3. GOLF III (1H1)
4. GOLF Mk III (1H1)
5. VENTO (1H2)
6. VENTO Saloon (1H2)
7. JETTA III (1H2)
8. GOLF III Variant (1H5)
9. GOLF Mk III Estate (1H5)
10. GOLF III Estate (1H5)
11. GOLF III Cabriolet (1E7)
12. CABRIO III (1E7)
13. GOLF Mk III Cabriolet (1E7)
14. PASSAT Variant (3A5, 35I)
15. PASSAT Estate (3A5, 35I)
16. CORDOBA (6K1, 6K2)
17. CORDOBA Saloon (6K1, 6K2)
18. SHARAN (7M8, 7M9, 7M6)
19. GALAXY (WGR)
20. ALHAMBRA (7V8, 7V9)
21. See more in applications

The operation of the coolant temperature switch

Engine overheating is a hazardous condition that can easily render the engine inoperative, causing damage to the engine. To prevent this from happening, a special device is provided in the vehicle - a coolant temperature switch.

VEMO brand Temperature Switch, coolant warning lamp of the car is part of the engine management system. It is very simple in terms of design - a thermistor inside a special shell. If the coolant temperature switch is defective, the vehicle's engine may overheat and fail at any time, which often entails a series of other malfunctions and breakdowns.

It is for this reason that car owners should carefully monitor not only the readings of the device, but also its condition. Timely repair or full replacement of the coolant temperature switch is a guarantee of the durability of your car.