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. YARIS (_P13_)
2. YARIS/VITZ (_P13_)
3. VITZ (_P13_)
4. SIRION (M1)
5. STORIA (M1)
6. TERIOS (J1_)
7. TARUNA (J1_)
8. YRV (M2)
9. YRV MPV (M2)
10. SIRION (M3_)
11. BOON (M3_)
12. C1 (PM_, PN_)
13. 107 (PM_, PN_)
14. AYGO (_B1_)
15. YARIS (_P9_)
16. YARIS/VITZ (_P9_)
17. VITZ (_P9_)
18. COPEN (L880_, L881_)
19. TERIOS (J2_)
20. BEGO (J2_)
21. See more in applications

The principle of the thermostat work

The classic BLUE PRINT 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.