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. C-MAX (DM2)
2. FOCUS C-MAX (DM2)
3. 3 Saloon (BK)
4. AXELA Saloon (BK)
5. 3 (BK)
6. AXELA (BK)
7. XSARA PICASSO (N68)
8. 407 (6D_)
9. 407 Saloon (6D_)
10. 307 (3A/C)
11. 307 SW (3H)
12. 307 Break (3E)
13. 307 Estate (3E)
14. 407 SW (6E_)
15. 206 Hatchback (2A/C)
16. 206 SW (2E/K)
17. FIESTA V (JH_, JD_)
18. IKON V (JH_, JD_)
19. C4 I (LC_)
20. C4 Coupe (LA_)
21. See more in applications

The principle of the thermostat work

The classic DAYCO 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.