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. 164 (164_)
2. 164 Saloon (164_)
3. 168 (164_)
4. REGATA (138_)
5. REGATA Saloon (138_)
6. REGATA Weekend (138_)
7. PRISMA (831_)
8. DELTA I (831_)
9. DELTA � (831_)
10. THEMA (834_)
11. THEMA SW (834_)
12. CROMA (154_)
13. 900 I Combi Coupe
14. 900 � Combi Coupe
15. 900 I (AC4, AM4)
16. 900 � (AC4, AM4)
17. XJ Coupe
18. XJS Coupe
19. XJSC Convertible (X27)
20. RITMO (138_)
21. See more in applications

The principle of the thermostat work

The classic CALORSTAT by Vernet 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.