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. HIACE IV Bus (_H1_)
2. REGIUS IV Bus (_H1_)
3. HIACE IV MPV (_H1_)
4. DYNA IV Bus (_H1_)
5. HIACE / COMMUTER IV Bus (_H1_)
6. QUANTUM IV Bus (_H1_)
7. SUPRA (_A8_)
8. HIACE IV Van (_H1_)
9. GS (JZS147_)
10. GS Saloon (JZS147_)
11. GS (_S16_)
12. GS Saloon (_S16_)
13. LAND CRUISER PRADO (_J15_)
14. YARIS VERSO (_P2_)
15. YARIS VERSO / FUN CARGO (_P2_)
16. FUN CARGO (_P2_)
17. ECHO VERSO (_P2_)
18. AVENSIS Liftback (_T22_)
19. AVENSIS (_T22_)
20. AVENSIS Estate (_T22_)
21. See more in applications

The principle of the thermostat work

The classic THERMOTEC 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.