Temp gage lite goes on & off. Needle rises & falls. what is problem? Can I fix?
This light has been going on and off for a month. The gauge rises to
250+ degrees after the light goes on...then goes back down. Yesterday I
heard a gurgling noise as the light came on. What is this and can I
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possible no water in the engine and it is overheating
this is indicated by the temp gauge rising and falling
temp gauge sender units need to be immersed in water full time to get a reading so if it goes up that is in water and when it falls back that is in nothing or steam
hot engine would account for hot floor
the temp gauge sends the power from the gauge to the sender unit which is a variable ground. That means that as the coolant heats up , the resistance in the sender is decreased and the current through the gage increases ans so the needle goes up
when that wire is shorting out some where the gauge will go to hot and when that short is removed the needle comes back down to cold
so that means that you will need to trace the wire along for where it is rubbed through or get an accredited auto electrician in to find the fault
CarGurusAug 20, 2014 - Also as my temperature gage rises but car does not overheat. ... tempneedle gets up towards the red mark while you're driving, then yes, ... i have a 2006Pontiac Grand prix and my temp. goes up to the ... crzgrl637 answered 6 months ago ...the cooling fans won't kick on then you will see gauge over heat.
If the coolant is below a certain level, the temperature sensor will not read anything and the temp gauge will not rise. Replace the cap, and check that you have enough coolant in the system. If this does not solve the problem, you will need to test/troubleshoot the coolant temperature sensor.
should be fine as long as the gage goes up and down and you get heat it should be fine make sure you consider the outside temp. as the engine starts it will heat up get really hot the the thermostate opens and the gage will fall and should but not always stay low it could just be the ip gage.
it is low on coolant...there could be a number of reasons,,,a stuck thermostat forcing the water out...,leaking water pump...leaking radiator or hose.....bad headgasket. some of this you could fix at home...you first need to locate the leak....pressure test the system....