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. KANGOO Express (FC0/1_)
2. KANGOO Rapid (FC0/1_)
3. KUBISTAR Van (X76)
4. VIVARO A Platform/Chassis (X83)
5. TRAFIC II Bus (JL)
6. TRAFIC II Van (FL)
7. TRAFIC Van (FL)
8. VIVARO A Bus (X83)
9. VIVARO A Van (X83)
10. CLIO II (BB_, CB_)
11. CLIO Mk II (BB_, CB_)
12. LUTECIA II (BB_, CB_)
13. CLIO MIO II (BB_, CB_)
14. KANGOO (KC0/1_)
15. MOVANO Bus (X70)
16. MOVANO Van (X70)
17. MASTER II Bus (JD)
18. MASTER II Van (FD)
19. THALIA I (LB_)
20. CLIO SYMBOL I (LB_)
21. See more in applications

The principle of the thermostat work

The classic DENSO 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.