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. MEGANE CC (EZ0/1_)
2. MICRA IV (K13_)
3. MARCH IV (K13_)
4. MARCH / MARCH ACTIVE IV (K13_)
5. MICRA IV (K13_, MK13K_)
6. QASHQAI / QASHQAI +2 I (J10, NJ10, JJ10E)
7. DUALIS I (J10, NJ10, JJ10E)
8. I30
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10. MAXIMA / MAXIMA QX V Saloon (A33)
11. PATHFINDER II (R50)
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15. X-TRAIL SUV (T30)
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The principle of the thermostat work

The classic HERTH+BUSS JAKOPARTS 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.