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. IQ (_J1_)
2. YARIS (_P13_)
3. YARIS/VITZ (_P13_)
4. VITZ (_P13_)
5. VERSO S (_P12_)
6. VERSO SPACE (_P12_)
7. RACTIS (_P12_)
8. YARIS (_P9_)
9. YARIS/VITZ (_P9_)
10. VITZ (_P9_)
11. TREZIA
12. AURIS (_E15_)
13. COROLLA (_E15_)
14. BLADE (_E15_)
15. COROLLA Saloon (_E15_)
16. COROLLA Saloon (_E15_, _E14_)
17. ALTIS Saloon (_E15_)
18. COROLLA ALTIS Saloon (_E14_, _E15_)
19. COROLLA Saloon (_E14_, _E15_)
20. COROLLA ALTIS Saloon (_E14_, _E15_)
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.