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. BERLINGO / BERLINGO FIRST Box Body/MPV (M_)
2. BERLINGO Box Body/MPV (M_)
3. PARTNER Box Body/MPV (5_, G_)
4. PARTNER Van (5_, G_)
5. RANCH Box Body/MPV (5_, G_)
6. PARTNER FURGON Box Body/MPV (5_, G_)
7. XSARA (N1)
8. XSARA Break (N2)
9. XSARA Estate (N2)
10. 206+ (2L_, 2M_)
11. 206 Hatchback (2A/C)
12. XSARA PICASSO (N68)
13. 307 (3A/C)
14. ZETA (22_)
15. EVASION MPV (22, U6)
16. SYNERGIE MPV (22, U6)
17. JUMPY (U6U_)
18. DISPATCH (U6U_)
19. JUMPY Van (BS_, BT_, BY_, BZ_)
20. DISPATCH Van (BS_, BT_, BY_, BZ_)
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The principle of the thermostat work

The classic MAHLE ORIGINAL 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.