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. COLT I (A15_A)
2. COLT I (A15_A, RA)
3. COLT � (A15_A)
4. COLT II (C1_A)
5. COLT II (C1_A, RB, RC)
6. COLT Mk II (C1_A)
7. COLT III (C5_A)
8. COLT III (C5_A, RD, RE)
9. COLT Mk III (C5_A)
10. LANCER I (A7_)
11. LANCER I Saloon (A7_)
12. LANCER I Station Wagon (A7_V)
13. LANCER II (A17_)
14. LANCER II Saloon (A17_)
15. LANCER � (A17_)
16. LANCER F (A15_)
17. COLT Saloon (A15_, RC)
18. COLT (A15_)
19. LANCER III (C1_A, C6_A)
20. COLT III Saloon (C1_A, C6_A, RD, RE)
21. See more in applications

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.