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2005 Dodge Caravan heater issue. One day the heater is working normal, the next day, it's blowing out cold air....thermostat or heater core..will flushing system help determine problem?

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Backflush heater core. New thermo and coolant. Be sure to burp system.

Posted on Oct 14, 2019

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  • Dodge Master
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Might help but probably not. In my considerable experience, when scale and sludge blocks a heater only high pressure flushing has a chance of shifting it and a blocked heater is blocked - not blocked one day and ok the next.

More likely an airlock is preventing circulation, maybe the degassing system is blocked...
Try checking both heater pipes are hot when the heater is blowing cold - if they are the trouble could be with the climate control or a stuck air mixing flap or actuator unit that works sometimes...

Posted on Oct 14, 2019

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Posted on Jan 02, 2017

Anonymous

  • 1 Answer

SOURCE: 93 ford festiva heater only blows cold air.

The heater only blows HOT air when set on defrost or floor settings. If you have the lever set for vent, only cold air will come out. Check to make sure you set the controls to floor or defrost. This is standard for all Festiva's.

Posted on Nov 16, 2008

Michael Borelli

  • 979 Answers

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

Anonymous

  • 2 Answers

SOURCE: heater problem 2005 grand caravan

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

Posted on Jan 03, 2009

dan

  • 651 Answers

SOURCE: heater blowing cold air

squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.

Posted on Jan 04, 2009

mike

  • 171 Answers

SOURCE: heater blows cold air have replaced the thermostat

sounds like the controller went bad use temp checker see what your temp is at inlet of heater core from hose

Posted on Sep 08, 2009

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1 Answer

2007 dodge caravan 3.3L its blowing cold air no heat at all .


you have a clogged heater core and needs to be replaced, this van has only one heater core am i right? check the thermostat too but i think is the heater core

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Heater blows cold air


Heater core could be blocked up, or the blend door is stuck on the cold side of the a/c evaporator or the blend door is stuck in the cold position.

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2007 grand caravan heat takes about 10 minutes plus to get warm-is this normal? It actually blows cool air for that long, but eventually blows hot air. Replacing the thermostat which might have been...


sounds like you have a actuator problem or the heater core may be stoped up check and make sure actuator is moving if not replace

make sure both heater core hoses are hot to touch at operating temp if both are not hot replace heater core

and of course check your coolant/antifreeze and insure it is full no water no heat

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4 Answers

My heater in my dodge caravan does not blow hot air. When my engine finnaly heats up, it blows only warm air. Its a 2006


First of all make sure your anti-freeze is at specification level's as well as make sure With the engine cold start the vehicle remove the radiator cap and make sure you see the flow of anti-freeze while keeping your hands as well as your clothing away from moving parts feel both hoses going into your heater core if the one on top of hot one on the bottom is cold then you have a Clogged heater core in which case you will need to flush the system . a simple garden hose will do the trick simply remove Both hoses to the heater core with the hose at the bottom line apply the garden hose until liquid comes out at the top of the other hose will probably see a lot of gunk. Also ensure that the vacuum line to the round ball under the hood is connected and not dry rotted.this will cause a vacuum leak to not allow the switch to fully engage from cold to hot. I hope this helps you.


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1 Answer

My heater is blowing cold air 2005 dodge grand caravan


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

Jan 21, 2009 | 2005 Dodge Grand Caravan

2 Answers

After car heats up (slow to heat) it stil blows cold until moving


You have a circulation problem, heater core may have restriction that why heat only comes when you drive ,also you may have a thermostat that stuck in the open position. Good Luck

Dec 22, 2008 | 2000 Dodge Caravan

1 Answer

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

Dec 16, 2008 | 2000 Dodge Caravan

1 Answer

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.

Nov 22, 2008 | 2002 Dodge Caravan

1 Answer

Heater problem 2005 grand caravan


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

Oct 20, 2008 | 2005 Dodge Grand Caravan

2 Answers

No hot air & sometimes no air at all


my 2000 dodge caravan heat sometime working sometime not working

Oct 17, 2008 | 2000 Dodge Caravan

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