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1990 dodge caravan heater blowed cold air - Cars & Trucks

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If its winter, your engine coolant is low. the heater core is like a mini radiator somewhere near your glove box compartment, if the engine coolant is low this little radiator may not be full of the engine coolant. take the cap off your radiator when the engine is cold and add engine coolant or if you have an external coolant reservoir top it of, you may have to do both depending on howlow your engine coolant is and make sure the coolant is the right kind for your engine. good luck, check for leaks while your at it.

Posted on Dec 08, 2012

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Could be a faulty thermostat, low coolant, or a faulty blend door under the dash.

Posted on Dec 08, 2012

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Posted on Jan 02, 2017

motor1258
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SOURCE: 2002 caravan, heater problems

That was a common complaint a few years back, due to the fact that the heater core is a little too much higher than the engine, which requires that extra push it gets when engine RPM's increase. One thing I did do on my Caravan was remove my hoses to the heater core, and use a small external pump with hoses to circulate C.L.R. through my core for a while, then let it sit with CLR in the core overnight.Next day I circulated it through again, both ways by reversing hoses, and then re-attached hoses, bled air out of system, and notice quite an improvement in heat at idle. Once cleaned out, the heater core allowed coolant flow through it better at idle. If your stumped by explanation, take it to an automotive shop, or a Rad shop, and get a quote on flushing that core out for you. I recommend the CLR, but it might be too time consuming for you , but a flush will probably show some noticeable improvement.

Posted on Nov 23, 2008

  • 7 Answers

SOURCE: i have a 2000 dodge caravan, no heat

Sounds like the air "blend" door might be inoperable. This door opens and closes a specified amount to regulate the amount of either cooled or heated air, as requested by the climate control unit. If the door is continually in the position which is bypassing the heater core (cold setting), the air will not get warm regardless of the condition/operation of the heater core. I'd suggest having this component checked.

Posted on Nov 28, 2008

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SOURCE: my heater is blowing cold air 2005 dodge grand caravan

In this order check the following:
Antifreeze level
thermostat
blend door
blend door motor...accordianman

Posted on Dec 16, 2008

  • 1779 Answers

SOURCE: 2001 Dodge Caravan heater blows cold air when stopped

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.

Posted on Dec 05, 2009

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larryzissler
  • 13 Answers

SOURCE: 2001 Dodge Grand Caravan air conditioning not blowing cold air

recharge a/c with 134a

Posted on Jun 08, 2010

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1 Answer

My 1999 caravan is blowing cold air


Check the water Coolant level in the coolant reservoir and also remove the radiator cap, which tends not to be on the radiator any more and check it is full. Also burp the system by removing air licks buy sqeezing the radiator hoses when the system is hot. Remove the radiator cap before you do this. You also need to check the thermostat for correct operation as it might be stuck closed. Remove it, put it in a pot of warm water put it on the stove and you should see it open before it comes to a simmer.

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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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Most likely the problem is a broken blend door inside the heater box or a broken adjuster cable going to the blend door, the blend door inside the heater box is responsible for heater output depending on your temp adjustment on your heater control panel, most likely the blend door is stuck in the cold position allowing cold air to come through the vents verses allowing the blower motor to blow warm air past the hot heater core to produce heat, check the temperature adjuster cable behind your heater controls and make sure its connected and not broken, lastly make sure the blend door isnt broken and operating freely.

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3 Answers

2001 Dodge Caravan heater blows cold air when stopped


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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1 Answer

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There is a water valve on behind the motor close to the firewall. This valve is to stop the water flow while the A/C is in operation. It maybe bad and locked in close postion not allowing the water to get to the heater core.

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If the temperature gauge is reading normal, have the heater control valve checked.

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Heater on driver-side blows barely warm air other vents blow cold


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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1 Answer

My heater is blowing cold air 2005 dodge grand caravan


In this order check the following:
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Be sure the system is full of coolant. what Engine is in it?

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check the coolant level, I had the same problem low coolant level.....no hot water to the the heater coil.

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