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. 100
2. 100 Saloon
3. 105,120 (742)
4. ESTELLE (742)
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6. 105,120 Saloon (744)
7. FAVORIT (781)
8. FAVORIT Forman (785)
9. FORMAN Forman (785)
10. FELICIA I (6U1)
11. FELICIA � (6U1)
12. FELICIA I Estate (6U5)
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14. 110
15. 110 Coupe
16. 130
17. 130 Saloon
18. ESTELLE
19. FELICIA I Pickup (6UF, 6U7)
20. FELICIA � Pickup (6UF, 6U7)
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The principle of the thermostat work

The classic VEMO 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.