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. CORSA D (S07)
2. ASTRA H Estate (A04)
3. CORSA B (S93)
4. VITA B (S93)
5. ASTRA G Hatchback (T98)
6. ASTRA G Estate (T98)
7. CORSA D Hatchback Van (S07)
8. ASTRA H GTC (A04)
9. ASTRA H (A04)
10. ASTRA G Saloon (T98)
11. CORSA C (X01)
12. VITA C (X01)
13. CORSA C Hatchback Van (X01)
14. TIGRA TwinTop (X04)
15. MERIVA A MPV (X03)
16. COMBO Tour
17. COMBO Box Body/MPV
18. ASTRA G CLASSIC Caravan (F35)
19. See more in applications

The principle of the thermostat work

The classic AUTOMEGA 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.