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some of the saturns have a thermostat that also controls the fan, so if the thermostat is bad the fan will be inoperable...others have a separate sensor..if the thermostate is the fan controler it will have a wire coming off of it, otherwise look for a sensor that goes into the water jacket or block of the engine, it will also effect your water temp gauge.

Answersome of the saturns have a thermostat that also controls the fan, so if the thermostat is bad the fan will be inoperable...others have a separate sensor..if the thermostate is the fan controler it will have a wire coming off of it, otherwise look for a sensor that goes into the water jacket or block of the engine, it will also effect your water temp gauge. AnswerYes. The Thermostat controls the flow of coolant through the radiator. The fan controlls the flow of air across the radiator. They both work together to assure the engine is allowed to reach normal temperature and not get too hot. A working thermostat restricts flow through the radiator until the coolant in the engine reaches 195 F. It then opens just enough to let the proportion of coolant being cooled in the radiator control the engine temp to 195. The radiator fan is temperature controlled, it comes on when when hot and cycles off when it cools down. Normally it is off at highway speed because plenty of air is flowing anyway. When parked or in city traffic it cycles on and off, coming on more when the vehicle is standing still or moving very slow.

The most common failure mode for a thermostat is to fail open. In that condition the engine will take a long time to warm up. (The first thing most drivers notice is it takes a long time to get heat in the passenger compartment.) With the thermostat stuck full open the fan will seldom run. It just won't get warm enough to turn on, unless you are towing or climbing mountains on a hot day, or come to a sudden stop after driving on the highway. When parked or operating in city traffic it will not come on as often as it would if the thermostat was working.

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โˆ™ 2011-09-13 17:35:53
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Q: Will a bad thermostat effect the operation of the radiator fan on an SL1?
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