If you have been using the air conditioning lately and the weather has been humid then if the a/c drain pipe could be blocked and water can sit on top of the heater core and steam gets blown onto the demister when you try to demist.
I would suggest that you have a small leak in your heater core. It does not take much of a leak to cause moisture on the windows. Eventually your radiator fluid will start to go down. This will not get any better and you need to replace the heater core. You may soon smell a sweet antifreeze smell as well and if you drive that way your interior will get sticky. Get it checked ASAP
SOURCE: Cooling fan won't work
hello,
cooling fan not working could be a lot of things.
first , test the fan itself, put a direct 12 volts to the fan terminal and watch if it would run.( be careful of the blades ), if it does not run, could be carbon brush. replace if necessary.
if it runs, check relay circuits. one for A/C and the other one for high temperature of engine.
check also for fuses with label " cooling fan" or "radiator fan". check all fuses just to be sure.
tnx 4 using Fixya,
Drcool
SOURCE: Overheating on the highway, but not in city?
have it checked at an auto supply store for free. it could be the coolant temp. sensor.
SOURCE: 1993 camaro overheating
make sure all the air induction is in place to the radiator behind the front bumper if its not there that maybe your problem, or blown headgasket
SOURCE: external radiator resevoir full - radiator not and car is cool
Yes there is supposed to be a suction if the hose is hooked up correctly. When the car cools all the way down it is supposed to pull coolant back in to the radiator from the resevoir. If it is not woring you may not have it sealed right. Make sure the radiator cap is all the way on correctly. You may have to push down and turn it some more. It has to have a seal to create suction.
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