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. ASTRA H Estate Van (L70)
2. ASTRA H Van (L70)
3. MERIVA Mk I (A) (X03)
4. CORSA C (X01)
5. VITA C (X01)
6. CORSA Mk II (C) (X01)
7. COMBO Box Body/MPV
8. COMBO Mk II (C) Box Body/MPV (F25)
9. MERIVA A MPV (X03)
10. COMBO Tour
11. ASTRA H (A04)
12. ASTRA H Estate (A04)
13. ASTRA Mk V (H) (A04)
14. ASTRAVAN Mk IV (G) Estate Van (T98)
15. ASTRA H GTC (A04)
16. ASTRA Mk V (H) Estate (A04)
17. ASTRA Mk V (H) Sport Hatch (A04)
18. CORSA Mk III (D) (S07)
19. COMBO TOUR Mk II (C) (F25)
20. ASTRA G Estate Van (F70)
21. See more in applications

The principle of the thermostat work

The classic BGA 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.