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. TRANSIT CONNECT (P65_, P70_, P80_)
3. FOCUS II (DA_, HCP, DP)
4. FOCUS II Turnier (DA_, FFS, DS)
5. FOCUS II Station Wagon (DA_, FFS, DS)
6. FOCUS II Saloon (DB_, FCH, DH)
7. S-MAX (WA6)
8. MONDEO IV (BA7)
9. MONDEO IV Turnier (BA7)
10. C-MAX (DM2)
11. MONDEO IV Saloon (BA7)
12. See more in applications

The principle of the thermostat work

The classic METZGER 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.