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. 206+ (2L_, 2M_)
2. 206 Hatchback (2A/C)
3. 207 (WA_, WC_)
4. 207/207+ (WA_, WC_)
5. 307 (3A/C)
6. 206 SW (2E/K)
7. PARTNER Box Body/MPV (5_, G_)
8. PARTNER Van (5_, G_)
9. RANCH Box Body/MPV (5_, G_)
10. PARTNER FURGON Box Body/MPV (5_, G_)
11. 1007 (KM_)
12. 206 Saloon
13. 307 Break (3E)
14. 307 Estate (3E)
15. 207 SW (WK_)
16. 207 SW Estate (WK_)
17. BIPPER (AA_)
18. PARTNER MPV (5_, G_)
19. PARTNER ESCAPADE MPV (5_, G_)
20. PARTNER (5_, G_)
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.