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. PANDA (141_)
2. PANDA Hatchback Van (141_)
3. IBIZA I (021A)
4. IBIZA � (021A)
5. FURA (025A)
6. MARBELLA (28)
7. MARBELLA Hatchback Van (028A)
8. 100 / METRO Hatchback (XP)
9. 100 Convertible (XP)
10. GOLF PLUS (5M1, 521)
11. GOLF VI (5K1)
12. A4 (8D2, B5)
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14. A4 / S4 (8D2, B5)
15. SHARAN (7M8, 7M9, 7M6)
16. OCTAVIA II Combi (1Z5)
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18. LAURA II (1Z3)
19. POLO CLASSIC (6V2)
20. FLIGHT CLASSIC (6V2)
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The principle of the thermostat work

The classic ERA 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.