Question about 1998 Dodge Caravan

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HEATER BLOWING COLD AIR, HOT WATER IN AND OUT OF HEATER CORE. BLOWER WORKS

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Blend door actuator under dash

Posted on Nov 24, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 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

  • 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

  • 12 Answers

SOURCE: Heater doesn't blow hot air

First check the coolant level in the radiator. Check your heater core hoses on the firewall underneath the hood. Let the car come up to temp. and feel the two hoses. If only one of them is getting hot you may have bad heater core or a bad heater control valve.

Posted on Jan 05, 2009

emissionwiz
  • 75797 Answers

SOURCE: Front Blower

ok, missed the part about the rear ac working, the part that causes this is called the air temperature control blend door actuator motor, it is an electric motor driven gear drive that moves the plastic door inside the air ducking to mix or shut off the hot or cold air from the ac evaporator core or the heater core, you will need to replace it.

Posted on Sep 03, 2009

Testimonial: "Great thanks that could be my problem. Is the motor by the inside coil"

  • 7 Answers

SOURCE: when i have the heater/defroster on the heater

It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

Posted on Sep 05, 2009

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1 Answer

Why is my heater blowing cold


Most likely it is the heater control valve that shifts air from blowing across your heater core to your air conditioner core.

If your fan works and your car is fairly new..meaning your heater core isn't dirty and full of craap...then it is the climate cotrol valve.
If you are lucky, it might be a thermostat that is bad and blocking hot water from entering your heater core. Bottom line, if hot water doesn't circulate thru that little heater core, you won't get heat.
You might be able to look under the hood and grab the hot water lines that go thru the firewall and feed your heater core. If they feel cold to the touch after engine has warmed up, then you aren't getting circulating water to the heater core. If they feel nice and warm, then the heater core is fine, but your climate control valve has closed off the fan that blows across the core to disperse heat into the cabin

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What have you checked so far ?
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good the blower works.
it takes 2 more things,
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probably heater door that allows heat into the interior not working or whatever controls you have that opens this door defective...1st make sure ur getting heat into your heater core by feeling both hoses which should both be hot, if one not hot then perhaps the valve that opens the water flow through the heater is not opening...sometimes u can see this visibly whereas you can then try to manually open it...

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have 2002 altima,blower works no heat at idle and very little heat when accelerating.I changed carbon cabin filter,made sure little gear under dash to temp knob wasnt broken,flushed and bled system.Nothing worked so checked hoses to heater core and found inlet hose was hot,outlet hose was not.So investigated this problem and came to conclusion heater core was clogged.An easy way to check is to get car to normal running temp. put on heater and blowers at full.Go under dash on passenger side where counsel meets firewall,this is where heater core core inlet and outlet aluminum tubbing go through firewall,you will be able to feel both tubes one closest to you is outlet, so if this one is not hot and and other is your heater core is clogged.I detached both inlet and outlet hoses to heater core from water control valve.Then I blasted water with waterhose and nozzle set at jet,first through outlet hose to blow gunk out,then through inlet hose until water runs clear.Reatach hoses fill and bled system.heater works great nice and hot!

Nov 10, 2012 | 2002 Nissan Altima

1 Answer

Heater core is working properly but car will not blow hot air only cold air i am thinking the flapper that controls hot \ cold is stuck in the cold air position


To troubleshoot this types of problem,click the link below :----http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html
--------Go through the procedure to confirm the issue.

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Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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This will help.Thanks.

Jan 25, 2012 | 2001 Buick LeSabre

1 Answer

My is heat is not work?My car is blowing cold air instead of hot air, I have a brand new heater core,the thermostat is not sticking,I got anti-freeze in it,It's getting cold in I need heat.Please help me


first feel the heater core hoses see if both are hot if so then your problem is in the blend air door must be stuck on cold. is your blower motor blowing cold air if not your blower motor might be the problem. the blend air door is down by the blower motor.

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1 Answer

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Yes clogged heater core may be the answer in your case .


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96 Jeep Grand Cherokee will not blow out hot air


It's possible you are not getting enough coolant flow to your heater core. Try pulling the hoses off the core, blowing it out with air compressor, fill with water and blow out again. Try this about five times and see what happens. Alot of times these cores will plug up or have restricted flow. They will blow warm at low speed but it won't flow enough hot coolant through to stay hot on high blower speed.

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