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. 208 I (CA_, CC_)
2. C-ELYSEE (DD_)
3. DS3
4. DS3 Convertible
5. C3 II (SC_)
6. 301
7. 2008 I (CU_)
8. 2008 I SUV (CU_)
9. 308 II (LB_, LP_, LW_, LH_, L3_)
10. C1 II (PA_, PS_)
11. C4 CACTUS
12. 108
13. DS 3 (SA_)
14. DS3 (SA_)
15. DS 3 Convertible (SB_)
16. DS3 Convertible (SB_)
17. C3 III (SX)
18. CROSSLAND X / CROSSLAND (P17, P2QO)
19. CROSSLAND X (P17)
20. C3 AIRCROSS II (2R_, 2C_)
21. See more in applications

The principle of the thermostat work

The classic METZGER 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.