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. ZX (N2)
2. 405 II (4B)
3. 405 II Saloon (4B)
4. 405 Mk II (4B)
5. 405 II Break (4E)
6. 405 Mk II Estate (4E)
7. 306 Hatchback (7A, 7C, N3, N5)
8. BOXER Bus (230P)
9. 306 (7B, N3, N5)
10. 306 Saloon (7B, N3, N5)
11. ZX Break (N2)
12. ZX Estate (N2)
13. JUMPER Bus (230P)
14. RELAY Bus (230P)
15. EVASION MPV (22, U6)
16. SYNERGIE MPV (22, U6)
17. 806 (221)
18. ULYSSE (220_)
19. XANTIA Break (X1_, X2_)
20. XANTIA Estate (X1_, X2_)
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.

HELLA 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.