Thermostat is a device for maintaining a static (constant) temperature, as its name implies. There are thermostats of different designs in many devices and mechanisms, from water heaters to refrigerators. There is also a thermostat in a car's internal combustion engine (liquid-cooled, of course). In a car, the thermostat regulates the temperature of the coolant (antifreeze): it accelerates the warm-up of a cold engine and provides heat removal from the hot one. Therefore, the engine works more efficiently and more comfortably for the driver, especially in winter - without a thermostat, the stove would usually blew cold air.

1. DS4 (NX_)
2. DS5
3. 508 I (8D_)
4. 3008 MPV (0U_)
5. C4 PICASSO II
6. C4 GRAND PICASSO II (DA_, DE_)
7. 308 II (LB_, LP_, LW_, LH_, L3_)
8. 308 SW II (LC_, LJ_, LR_, LX_, L4_)
9. 208 I (CA_, CC_)
10. DS3
11. DS3 Convertible
12. 508 SW I (8E_)
13. 5008 (0U_, 0E_)
14. DS 3 (SA_)
15. DS3 (SA_)
16. DS 3 Convertible (SB_)
17. DS3 Convertible (SB_)
18. DS 4 / DS 4 CROSSBACK (NX_)
19. DS 5 (KF_)
20. DS5 (KF_)
21. See more in applications

The principle of the thermostat work

The classic CALORSTAT by Vernet brand Thermostat, coolant is a movable valve that moves due to a change in the external environment - heating or cooling of antifreeze. The thermostat is made of a thermoelement filled with a substance resembling wax in structure - ceresin, with the addition of copper powder, graphite or aluminum for better thermal conductivity. At a certain temperature of the antifreeze, ceresin expands, opening the thermostat valve. When the motor cools down, ceresin contracts and the thermostat closes again.