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. FIESTA IV (JA_, JB_)
2. FIESTA Mk IV (JA_, JB_)
3. 121 III (JASM, JBSM)
4. SOHO III (JASM, JBSM)
5. PUMA (EC_)
6. FOCUS (DAW, DBW)
7. FOCUS Saloon (DFW)
8. FOCUS Turnier (DNW)
9. FOCUS Clipper (DNW)
10. FIESTA V (JH_, JD_)
11. IKON V (JH_, JD_)
12. FUSION (JU_)
13. 2 (DY)
14. DEMIO (DY)
15. FOCUS C-MAX (DM2)
16. FOCUS II (DA_, HCP, DP)
17. FOCUS II Turnier (DA_, FFS, DS)
18. FOCUS II Station Wagon (DA_, FFS, DS)
19. S40 II (544)
20. S40 II Saloon (544)
21. See more in applications

The principle of the thermostat work

The classic FAE 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.