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Engine stays cool but I don't have interior heat?

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Faulty thermostat ?
Low on coolant ?

Posted on Mar 29, 2015


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2004 infinti G35 cooling fans stay on constantly when at normal temp, what is the problem??

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There are two radiators in my 1991 Buick LeSabre. Which ones do which, and are they connected? is your engine radiator ( the big one) which cools engine.
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Defective thermostat probaly staying open, Or a blockage in the cooling system , Flush out the whole ststem, End don,t have the front of the vehicle raise up,

Nov 28, 2012 | 2001 Pontiac Aztek

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Mercedes S430

When you shut the car off something is staying on in the vehicle, causing a current draw on the battery, causing it to go dead over night. something that would cause this would be like a under the hood light, trunk light, interior light staying on. visually check it. and if you don't find anything you might want to buy a fluke/ volt meter, to check for unwanted current draw when the vehicle is off. your local mechanic could help. it could become more extensive then this but most likely not by the sounds of it.

Oct 14, 2012 | Mercedes-Benz Cars & Trucks

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I have a 2004 Toyota Sienna with a problem in the engine cooling system. I have had the radiator and thermostat replaced and it still overheats. It does not run out of coolant. Most of the time it will...

the problem might be the thermostat is stuck in the open position, not closed, this keeps the water circulating and its never in the radiator long enough to be cooled, which would explain the bubbling in the over flow tank, flush the system and add new coolant, replace the thermostat ,

Sep 17, 2011 | 2004 Toyota Sienna

1 Answer

Having heating problems, don't get hot enough and/or quick enough

Hello sounds like the thermostat is stuck open. This device opens and shuts depending on the temperature of the engine. When the engine gets to a certain temperature it will open allowing hot water to circulate to the heater matrix which warms up the car interior. As yours is possibly stuck open the cold water is just being circulated, hence blowing cool air. You should notice the temperature gauge stays very low unless you are stuck in traffic where it will rise. This is a cheap fix so no need to worry.

Dec 11, 2010 | 1998 Volvo S70

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Lack of heat in interior with warm engine and properly functioning cooling system, can i bypass controlling coolant flow to heat exchanger?

Umm if you do not have heat then you don't hav a properly functioning cooling system..;)

Replace heater core..

Nov 25, 2010 | 1997 Ford Explorer AWD

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2001 2.5 s type engine heats up but no heat from heater unless going 80mph

It could be an vacuum pipe that is lose. Fan not working check fuse first.Hot water valve from engine stuck ,turn on heater switch and feel pipe to car.your car has climate control ,that means it will outo cool or heat the interior of your car.

Nov 21, 2010 | 2001 Jaguar S-Type

1 Answer

1997 Subaru Outback impreza engine overheats and no one has figured out why. Radiator is not the problem. Engine does not overheat right away.

Do the cooling fans come on?And do they go off?Or do the fans come on and stay on?If the cooling fans come on,and then the cooling fans ,or fan,goes off,then the system may not be over heating.If the engine is over heating for sure,and the fans come on,but don`t go off,replace the thermostat.Then you need to bleed the cooling system of air.The coolant will not circulate if there is air in the cooling system.Also,the water pump blades on the inside(in the water jacket)could be worn down,or have ome off.This would cause the problem also.If I can help,any further,please let me know.>>

Oct 06, 2009 | 1997 Subaru Outback

1 Answer

Lack of interior heat

If you are getting air into the cabin, then there is prbably no abstruction the is keeping the warm air out.

Check the coolant leval. There might be enough to cool the engine, but becuase the heater core is higher than the engine, the coolant might not be able to get to it.

Nov 26, 2008 | 1998 Chrysler Concorde

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