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. FOCUS (DAW, DBW)
2. FOCUS Saloon (DFW)
3. FOCUS Turnier (DNW)
4. FOCUS Clipper (DNW)
5. FIESTA Van (JV_)
6. COURIER Van (JV_)
7. FIESTA IV (JA_, JB_)
8. FIESTA Mk IV (JA_, JB_)
9. FIESTA Van (J5_, J3_)
10. COURIER Van (J5_, J3_)
11. TOURNEO CONNECT
12. TRANSIT CONNECT
13. TRANSIT CONNECT (P65_, P70_, P80_)
14. FOCUS II (DA_, HCP, DP)
15. FOCUS II Turnier (DA_, FFS, DS)
16. FOCUS II Station Wagon (DA_, FFS, DS)
17. FOCUS C-MAX (DM2)
18. FOCUS II Saloon (DB_, FCH, DH)
19. GALAXY (WA6)
20. S-MAX (WA6)
21. See more in applications

The principle of the thermostat work

The classic AIC 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.