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2000 dodge grand caravan sport 3.3L flexonly blows cold air

I'm currently working on a 2000 dodge grand caravan sport 3.3L V6 Flex, The heater hose assembly rusted out so I fixed it, I also did a heater core flush and I also replaced the thermostat and it still only blows cold air, I can hear the climate control engage and when I move it. Coolant levels are topped off. My question is what could be the reason for this? and how can I fix it?

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  • Cars & Trucks Master
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You say you can hear the climate control work, but the blend door for the heater may not be moving. If both heater hoses are hot, I would suspect the blend door.

Posted on Dec 10, 2012

  • Chris Dec 10, 2012

    What if the hoses aren't hot? and I have already replaced the thermostat.

  •  Stephen
    Stephen Dec 10, 2012

    If the heater hoses are not both hot, the engine is not heating up, or the system is low on coolant, or something else is keeping the coolant from flowing thru the hoses. When the heater core is plugged one hose is usually hot and the other is warm.

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Nomodo4u
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SOURCE: Dodge 2002 Grand Caravan V6 3.3 engine overheating/no cabin heat.

Replace the bad radiator hose first.  Second- get you special formulated anti-freeze dye from the auto store and pour it into the radiator.  Third- make sure you got all the air pockets out of your system, cause the coolant system won't work with air pockets in it.  Fourth- Check for leaks by looking for the colored dye.  If it's not the radiator hose, then could possibly be a pin hole in your radiator.  Would suggest replacing all the radiator hoses at the same time while you got the coolant system disconnected, cause you don't want to have to come back and replace another hose in a few months.

Posted on Nov 06, 2009

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Assuming the radiator is full of coolant, you are describing a faulty thermostat. The thermostat is closed when the engine is cold to restrict coolant flow until it warms up.

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this sounds normal in very cold conditions! The air is never hot when you first start the car in any car, until the engine warms up, then the heater air will also warm. You could check your anti-freeze level for the first thing. If you don't have enough anti-freeze, it won't run through your heater to give you the proper heat

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Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.

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Replace the bad radiator hose first.  Second- get you special formulated anti-freeze dye from the auto store and pour it into the radiator.  Third- make sure you got all the air pockets out of your system, cause the coolant system won't work with air pockets in it.  Fourth- Check for leaks by looking for the colored dye.  If it's not the radiator hose, then could possibly be a pin hole in your radiator.  Would suggest replacing all the radiator hoses at the same time while you got the coolant system disconnected, cause you don't want to have to come back and replace another hose in a few months.

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the most probabale cause of this would be a disfunctional hear core if you replace your heater your heater will more than likley work the the way it's supposed to

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In this order check the following:
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