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. C4 II (B7)
2. DS4 (NX_)
3. C4 GRAND PICASSO I (UA_)
4. C3 PICASSO (SH_)
5. BERLINGO Box Body/MPV (B9)
6. DS3
7. C3 II (SC_)
8. C5 III (RD_)
9. C5 III Saloon (RD_)
10. C5 III Break (RW_)
11. 208 I (CA_, CC_)
12. C4 GRAND PICASSO II (DA_, DE_)
13. C4 AIRCROSS
14. AIRCROSS
15. BERLINGO MULTISPACE (B9)
16. C-ELYSEE (DD_)
17. C4 PICASSO II
18. DS5
19. C4 CACTUS
20. JUMPY (VF7)
21. See more in applications

The principle of the thermostat work

The classic 3RG 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.