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The engine temperature fluctuates some what because the thermostat is opening and closing all the time to maintain the proper temperature, the cooling fans both mechanical clutch types and electric do not always run at full speed and in the case of electrical fans only run when the engine is getting to hot. Most electrical fans will turn on at about 220-230 degrees and off at around 200-210 so the engine will constantly be getting hotter and colder when the vehicle is not moving but should be more consistent when cruising since the fans are not required.
Temperature fluctuations can also be caused by engine cooling system failures like a
failing head gasket which will pressurise the cooling system and halt coolant flow causing the engine to overheat. If your engine is not overheating and your heater works fine no excessive white smoke out of the tailpipe and you have normal fluctuations then you shouldn't be concerned about it.
You may also be low on coolant from a leak in the system.
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∙ 14y ago
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Why does the temperature rise and fall in a Dodge Caravan and the fluctuate?
need to be more specific. temp of engine, or temp of AC air.
Why does the temperature gauge fluctuate in cold weather and heat comes on and off?
Check coolant level Could be thermostat opening and closing due to engine coolant temperature flutuation
Can you use the word fluctuate in a sentence?
Example sentences for the verb to fluctuate:The financial scare caused the prices to fluctuate wildly.Gas prices fluctuate with the price of oil.My heart's rhythm always seemed to fluctuate wildly when she entered the room.This time of year, the temperature can fluctuate as much as thirty degrees in a day.In the desert, the temperature might fluctuate dramatically from day to night.
My Peugeot 306 temperature gauge keeps fluctuating whats wrong with it?
An automobile temperature gauge can fluctuate when the thermostat is opening and closing erratically. The temperature gauge can also fluctuate when the ground wire is loose.
How do you use fluctuate in a sentence?
The word 'fluctuate' is a verb (fluctuate, fluctuates, fluctuating, fluctuated), a word meaning to vary irregularly.Example uses:The financial scare caused the prices to fluctuatewildly.The market's stocks have been fluctuating since 2009.Gas prices fluctuate with the price of oil.My heart's rhythm always seemed to fluctuate wildly when she entered the room.This time of year, the temperature will fluctuate as much as thirty degrees in a day.In the desert, the temperature might fluctuate dramatically from time to time.My weight tends to fluctuate.
What causes the Coolant gauge to fluctuate on 1994 Ford Mustang?
Temperature.
What property of water explains why temperature along the coast do not fluctuate as often as inland temperature?
It has a high heat capacity
What can cause the temperature gauge to fluctuate in your 2001 dodge ram 1500?
low coolant
Why you use nitrogen gas in the tire?
It holds pressure better and does not fluctuate as much with changes in temperature.
A vertebrate whose body temperature does not fluctuate with ambient temp?
Is warm blooded like a mammal or a bird.
What causes a 1999 f150 temp sensor to peg out or fluctuate without the engine really being hot?
Temperature Gauge Sending Unit The sending unit is located in the front section of the intake manifold in the vicinity of the thermostat. Change it.
Why would engine idle speed fluctuate?
More times than not, it turns out to be the TPS sensor
