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. VIVARO A Platform/Chassis (X83)
2. TRAFIC II Bus (JL)
3. TRAFIC II Van (FL)
4. TRAFIC Van (FL)
5. VIVARO A Bus (X83)
6. VIVARO A Van (X83)
7. MEGANE I (BA0/1_)
8. MEGANE I Classic (LA0/1_)
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13. MOVANO Bus (X70)
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15. MASTER II Bus (JD)
16. MASTER II Van (FD)
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19. INTERSTAR Bus (X70)
20. INTERSTAR Van (X70)
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The principle of the thermostat work

The classic HOFFER 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.