Question about 1999 Chevrolet Lumina

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Heats up when stopped and cools down when running

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Almost certainly a problem with the radiator cooling fan. When the car is stationary only the fan forces air through the radiator to cool the coolant. When on the move the car pushes air through the radiator. Next time is gets warm put the interior heating on to full blast. It will be uncomfortably hot but it will help take heat from the coolant. Check out that fan operation

Posted on May 05, 2010

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1 Answer

Air runs until car runs a distance and engine is shut down. when restart air is not cool?


Well of course not. When you shut the car down, all water circulation stops so engine heat goes way up. This means the radiator gets hot too, and therefore so does the AC condensor. It takes time for all these things to cool back down when you start it back up.

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Why is car heating up en it has water and a new thermostat??


check to make sure the cooling fan is working if not this is your problem if its working then have a head gasket test done as this too can cause an overheat problem. also have you bleed all the air out of the system.

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The truck run for a short time then stop .I waite some time then restart


If you or a friend have an old coil laying around switch it out and see how it runs. Sometimes when a coil heats up it stops working then when it cools down a little it starts working again

Jul 29, 2011 | 1989 Dodge D150

1 Answer

Over heating


If your vehical is over heating at idea it is most likely the radiator fan
this can be checked by running the car until it heats up and looking at the fan to see if it is running.
This usually isn't an issue as long as you are driving, but when you stop or driving slow or in traffic it will start heating up quickly. your fan keeps air flow going through the engine while at a stop to help cool down the engine compartment and pull.push air through the radiator

If you still over heat no matter if your driving or stopped it may be a thermostatic radiator valve that went bad. this is a release valve between the radiator and the engine that helps control the coolent flow between the engine and radiator and control how much heat is taken out of the engine to be cooled in the radiator.

So, run the car and see if the radiator fan kicks on. if it does, it's probably not a bad fan. if your car starts over heating and the fan never comes on it's most likely some problem with the fan

if it is turning and you are still having problems overheating go buy a new valve and change it out. cost you at most 5 bucks for a new one (probably less)

Jul 02, 2011 | 2001 Kia Rio

1 Answer

No heat runs hot when parked and running ,cools down a little bit when driving ,still no heat


Sounds like either a thermostat problem, certainly that if it cools right down when driving on the motorways etc or possibly a partially blocked heater matrix. Try running a good cooling system flush through it and change the thermostat.

Hope this helps

John

Dec 02, 2010 | 1994 Jeep Cherokee

3 Answers

Cooling fan runs even after motor turned off


This is perfectly natural for the fan to continue running when the motor is turned off. I have seen them run for up to 15 minutes depending on how hot the day and the engine are. If it is not cutting off at all then you may have a problem in your heat sensor.

Jun 17, 2010 | 1999 Jeep Cherokee

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Why does the fan keep running on 2005 jetta after turning off


You are talking about the thermo electric cooling fan, its operation is independent of the car's electical system. It is switched on and off by the engine temperature. When you park, the engine heat soaks upward to heat the thermostat turning the fan on. It will run until the engine cools down and the thermostat switches it off. Quite normal operation.

Apr 19, 2010 | 2007 Volkswagen Jetta 2.5 Sedan

1 Answer

Hi, I got two problems first is when the car idles or stops and stop lights for a period of time the car starts to over heat but when your going down the highway or just any street as long as the car is...


here are a few things to check, coolant level low, drivebelt defective, radiator could be blocked, faulty thermostat, electric cooling fans not working which makes the engine overheat, when going a certain speed it is air cooled, but when you stop it will overheat.

Jan 27, 2010 | 1999 Ford Taurus

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Hyundai accent stops running after heats up


I had the exact smae problem and threw aaway a ton of money on bad "guesses" at what was wrong. The actual fix was replacing the crank shaft position sensor for 50 or 60 bucks. Swapped out bad for good and cars has run great every day since.

Dec 10, 2008 | 2000 Hyundai Accent

1 Answer

My car has a over heating problem, i have a heat issue for a few month while in the drive thru,after driving on the freeway, or ideling at a stop light on a hot day, however running the heater when it...


first thing to do is make sure yo have enough anti freeze in the radiator, once yo know yo have that you can drive the car.

secondly the problem could be a bad radiator fan motor which does not come on when it is supossed to, as long as the wind is blowing against the radiator it will not over heat so again check the radiatro fan motor and the fan relay.

Nov 14, 2008 | Mazda Protege Cars & Trucks

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