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. 323 C V (BA)
2. 323 ASTINA V (BA)
3. 323 C Mk V (BA)
4. FAMILIA V (BA)
5. FIESTA IV (JA_, JB_)
6. FIESTA Mk IV (JA_, JB_)
7. 121 III (JASM, JBSM)
8. SOHO III (JASM, JBSM)
9. FIESTA Van (J5_, J3_)
10. COURIER Van (J5_, J3_)
11. FOCUS III Saloon
12. FOCUS III
13. FOCUS III Turnier
14. FOCUS (DAW, DBW)
15. FOCUS Saloon (DFW)
16. FIESTA VI (CB1, CCN)
17. FIESTA V (JH_, JD_)
18. IKON V (JH_, JD_)
19. FUSION (JU_)
20. 2 (DY)
21. See more in applications

The principle of the thermostat work

The classic JAPANPARTS 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.