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. 80 (81, 85, B2)
2. 80 Saloon (81, 85, B2)
3. 4000 (81, 85, B2)
4. 80 (89, 89Q, 8A, B3)
5. 80 Saloon (89, 89Q, 8A, B3)
6. 4000 (89, 89Q, 8A, B3)
7. 100 (44, 44Q, C3)
8. 100 / 5000 (44, 44Q, C3)
9. 500 (44, 44Q, C3)
10. 100 Avant (44, 44Q, C3)
11. 5000 Avant (44, 44Q, C3)
12. GOLF II (19E, 1G1)
13. GOLF Mk II (19E, 1G1)
14. JETTA II (19E, 1G2, 165)
15. JETTA II Saloon (19E, 1G2, 165)
16. JETTA Mk II (19E, 1G2, 165)
17. LT 28-35 I Bus (281-363)
18. LT28-50 � Bus (281-363)
19. PASSAT Variant (3A5, 35I)
20. PASSAT Estate (3A5, 35I)
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.

EPS 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.