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. 508 I (8D_)
2. 508 SW I (8E_)
3. MONDEO IV Turnier (BA7)
4. MONDEO IV (BA7)
5. GALAXY (WA6)
6. S-MAX (WA6)
7. EXPERT TEPEE (VF3X_)
8. FOCUS II Turnier (DA_, FFS, DS)
9. FOCUS II Station Wagon (DA_, FFS, DS)
10. FOCUS II (DA_, HCP, DP)
11. FOCUS C-MAX (DM2)
12. C-MAX (DM2)
13. SCUDO Bus (270_, 272_)
14. SCUDO MPV (270_, 272_)
15. SCUDO Van (270_, 272_)
16. 307 (3A/C)
17. 407 (6D_)
18. 407 Saloon (6D_)
19. S40 II (544)
20. S40 II Saloon (544)
21. See more in applications

The principle of the thermostat work

The classic MOTORAD 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.