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Jun 25, 2012 - Today I was boiling inside my car as it was a very hot day and my ...cold, it almost never goes up to even 1/4 of the temperature gauge, the ... Where I live, it's hot enough that even with the thermostat wide open the engine won't stay at C.. ... How to Match Skin Color Between Pictures Of The Same Person In ...
Check if the wire has not come loose from the sensor, if not, remove the wire from the sensor and hold it against any clean spot on the engine block whilst the ignition is on, (you need someone to be inside the car) if the needle travels all the way to the hot position, you will need to replace the sensor
If the gauge does not go back to cold when the engine is cold, it could be the gauge on the dash. I am assuming the gas gauge drops with the key off. You could unplug the temp sensor on the engine to see if it makes any difference.
YOur guage is faulty. Your will need to replace your guage if it stays in the hot position even when your car is off and your key is out of the ignition. If it only rises to hot when you turn the key to the run position, you have a wire between your guage and your temp sending unit that has been gounded out. Usually this happens when a person opens their hood to add oil or perform some minor maintenance on the engine and inadvertantly bumps the sensor or switch or wiring. This causes about 65% of these minor issues people incur, but if it does stay all the way up with your key out of the ignition switch, then you will need to replace your temp guage.
Its fine, temp needle going up shows that engine is warming up and as soon as the radiator fan starts, temp of coolant drop and this is shown by the temp gauge needle. In most cars (even mine) it stays in middle most of the time unless you are in a traffic with AC on, it will show up more temp. What you can do is get the radiator flushed and coolant changed. Also check the water pump. To do so when engine is cold (in first start in morning), open the radiator cap and ask someone to rev the engine. If the coolant level moves up and down then water pump is also fine.
Switch ig. on, ground the sender unit wire for about 3 seconds see if the temp. gauge moves, if so change sender unit, if not then it is a faulty gauge reader.
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