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To let the engine warm up by closing flow of coolant. When operating temperature is reached the thermostat pops open allowing full flow of coolant. Totally necessary in winter !

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Q: What is the purpose of a car thermostat?
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What is the purpose for the thermostat in your car?

To control the flow of coolant in the engine, so the temp will reach normal operating range


Is car thermostat necessary in a tropical temperature?

is car thermostat necessary in a tropicalize car?


How can you tell wheather the radiator or the thermostat is not working because my car has a very serious problem with it overheating?

Take your thermostat out and put everything back together, run your car without a thermostat... If your car no longer overheats, replace your thermostat.


Would the thermostat cause the car not to start in a 2001 Monte Carlo?

no, the thermostat would have nothing to do with the car not starting.


Why does the temperature gauge on your car fluctuate?

The temperature gauge on a car fluctuates because the car's thermostat is opening and closing. The gauge goes up when the thermostat closes and the gauge goes down when the thermostat opens.


Why would a car thermostat jump around?

Must be sticking, replace the thermostat.


Can a car overheat with a stuck open thermostat?

Usually the car would run cool, unless the thermostat is stuck partially open.


How do one change the thermostat on Chevy car?

One can change the thermostat on a Chevy car by draining the coolant and disconnecting the upper radiator hose. The thermostat housing is then unbolted, the old thermostat removed, and a new unit placed in the housing.


Why cant get the heater to work in the car?

You could have a problem with your thermostat in the car.


If you have got a 190 degree thermosat in your car if you put a 180 degree thermostat in it will the car run cooler?

Thermostat will open sooner car may not necessarily run cooler


Where is the thermostat locate on 99 lincoln?

The Thermostat on the 1999 Lincoln Continental is located on the under side of the car Where the the Radiator Hose, that runs along the bottom of the car, is connected to the Thermostat Housing. You can only get to it by getting underneath the car where the Radiator Hose is connected.


Why would your car not have heat?

thermostat is frozen.