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jesse
Dodge Dakota
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4/09/2002
21:15:49

Subject: Heater blowing cold air
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I have a 97 5.2 that is blowing cold air when on heat under every circumstance. I have changed t stat flushed the whole cooling system still no heat. I saw a post that other people have had the same problem if anybody has solved this problem please let me know



Jim
Dodge Dakota
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6/01/2002
06:58:35

RE: Heater blowing cold air
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Have you checked the heater coil. I have seen this before in other vehicles, so you might check that.
If thats not it try checking the cold hot switch when you change it from cold to hot it might not be switching it behind the control panel. I had a 91 plymouth voyager mini van that was doing this.
Hope this helps out some.

Jim



Knobbyman
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6/02/2002
10:55:31

RE: Heater blowing cold air
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I rode in a 2000 Dakota that was doing that.. Kind of. It would blow hot air at low speeds but then a/c at higher speeds. We had to top off the radiator for it to work correctly. Haven't had any new problems.

Might just check the lvl of your Coolant.

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Bill Smith
Dodge Dakota
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6/02/2002
21:47:54

RE: Heater blowing cold air
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check the water control valve in the heater hoses under the hood. some of them have a vacume hose that can come off,or its stuck in the full cold mode. this is used to shut off thewater to the heater core when you have the a/c on.it can stick in either direction. We sell them at Auto Zone, I think they're around 20 bucks. Hope this helps.



Richard
Dodge Dakota
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12/06/2003
21:31:32

RE: Heater blowing cold air
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I had my radiator flush,my thermostat change twice and r&r clutch, fan . Still no heat in my truck 1997 Dodge Dakota 6 cyl.



AnnaMaria
Dodge Dakota
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12/08/2003
04:09:17

RE: Heater blowing cold air
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I too am having the same problem. I have a 91 Plymouth Voyager and when I put the heater on, it just blows cold air and if I drive it for more than 15 mins., it starts to overheat. I have changed the thermostat twice, but that wasn't the problem. Any suggestions? Also I noticed when the temperature outside was above 55 degrees, the heater would blow warmer and it wouldn't over heat. Could you also maybe give me a roundabout price on whatever you may think it is. (Not sure if it will be worth it) My friend suggested that it may be a censor! HELP!



miller
Dodge Dakota
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12/09/2003
09:58:11

RE: Heater blowing cold air
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Had the same problem on my 1999 3.9. All I did was following the instructions posted on this site to flush the heater core and my heat returned. This is a very simple problem to fix and doesn't take that long.

Hope this helps.

Below is a copy of what I pulled off other posts:

Here is an answer to the original question about the posters heater core. It is plugged. I had the same exact problem. I had flushed out my coolant system several times, but still no real heat coming from the heater. I then finally thought about it and realized the the convential way of flushing out a coolant system does not really flush out the heater core. The problem is that when you flush the coolant system out you normally connect the flushing water to the inlet side of the heater core hose and then backflush the system out through the radiator cap. This works fine for the engine and the radiator, but does not backflush the heater core. But for less than 99 cents and about 15 minutes you can easily backflush your heater core yourself.

1. What you have to do is get a 5/8 inch female garden hose adapter. This can be purchased at just about any hardware store. Make sure it is the kind that slips inside the garden hose.

2. Then with the engine cool you need to disconnect the outlet hose of the heater core from the engine. You need to do this at the water pump connection, which should be on the driver's side of the engine. Then insert the garden hose adapter into the end of the hose.

3. Then disconnect the heater core inlet hose from the engine connection. On my Dakota this is easily done at the splice that is on the passengers side of the engine. This splice is where you normally connect to flush out the coolant system.

4. Then hook a garden hose up to the outlet hose and turn on the water. Have someone help you turn on and off the water as you flush out the heater core.

5. You will probably have to flush the core for a good 5 minutes to fully clean it out. Then reconnect your heater hoses as they were and enjoy the heat.

Try and collect atleast the first 2 gallons of stuff you flush out and dispose of this according to your local laws. After the first 2 gallons all you should get out of your heater core is dirty water. This should be ok to just dump on the ground but make sure first.

And yes -- top outlet from heater core goes to engine, bottom outlet to water pump -- at least on my '96 3.9 liter.

I used to install a Prestone Flush-n-Fill kit on everything I drove. I got away from that philosophy, and as a result I darn near froze! If you install a kit, do it in the line that goes from the pump to the heater. Then, just clamp the heater hose between the fill connector and the pump to force the water back through the heater, through the engine, and into the bottom of the radiator, and down the drain.




warren
Dodge Dakota
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1/24/2004
15:57:21

RE: Heater blowing cold air
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i have a 1977 ford f-100 , i changed the thermostat in it and there still was no heat and one of the heater hose was cold and one was hot ,is it right to do that. if not how do i get heat, the water pump is working find.



Huh
Dodge Dakota
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1/25/2004
10:47:52

RE: Heater blowing cold air
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1977 Ford? I suggest you get heat by setting the whole thing on fire.



Joshua Sniffe
Dodge Dakota
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2/08/2004
15:40:15

RE: loosing antifreeze
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i have 2003 dodge 1500 standard pu i keep adding antifreeze but the resivore is dry in 4or5 days ?there is no leak anywhere where is the antifreeze going?



harry
Dodge Dakota
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2/10/2004
17:51:33

RE: Heater blowing cold air
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the antifreeze is going out the exhust ;)



Invictuz
Dodge Dakota
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3/23/2004
02:29:21

RE: Heater blowing cold air
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Your block is cracked if your water level is good but you are blowing cold air while running the heater...



Timberwolf
GenIII
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3/23/2004
17:08:57

RE: Heater blowing cold air
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This thread was started almost 2 years ago guys. I think he probably has gotten the problem fixed by now.



frozen
Dodge Dakota
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12/31/2005
00:03:02

RE: Heater blowing cold air
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I get cold air on the drivers side and hot air on the passenger side.The mechanic seems to think its the blend door motor but,I told him the two sides are not independently controlled and I can adjust the temp.on the passenger side but,the drivers side is always cold or sometimes luke warm.What is the problem?



shawnwarvet
Dodge Dakota
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3/14/2006
20:16:59

RE: Heater blowing cold air
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I just took all the advice of everyone with the reverse flush, when I hit the water, it took mybe 30 seconds for anything to come out. And when it did it was bright reddish ornge rust color. I bought it off a old man, who never changed the oil or anything. Well needless to say I have put alot into her. She is a red 96 Dakota with the 3.9, with 121,000. She is in awsome shape. I do have 1 question, she makes a little rattle in the motor, sort of like a valve spring rattle, not to bad, like when you use low oct gas and put a load on her the valves rattle, does anyone got a fix for that.



johnny0454
Dodge Dakota
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4/19/2006
01:19:54

RE: Heater blowing cold air
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About the engine rattle, I think it it is probably the timing chain. The stock chain set has no tensioner, just replace it with a set that has a tensioner. I had the exact same problem on my '93 and now it is fine.



johnny0454
Dodge Dakota
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4/23/2006
21:28:35

RE: Heater blowing cold air
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Thanks guys for the info, I back flushed my heater core and now it works perfect. Thanks again!



mason
Dodge Dakota
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4/26/2006
00:22:18

RE: Heater blowing cold air
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Who thought up this one?
If it only blows cold air, it ain't a heater!
Geez!





Amy
Dodge Dakota
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12/05/2006
13:37:32

RE: Heater blowing cold air
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I have a 2006 Nissan pathfinder, and my heat blows cold air, when i slow down but gets hot when I'm on the highway or get on it(gas). It strange that it comes and goes like that. Any suggestions???



trish
Dodge Dakota
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12/06/2006
20:23:05

RE: Heater blowing cold air
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i have a 97 ford explorer xlt the heater is blowing cold air have changed the thermostat, heater control valve,flushed the sysytem,flushed and backflushed the heater core and still no heat can anyone help?



little jer
Dodge Dakota
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12/06/2006
22:34:53

RE: Heater blowing cold air
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only thing left to check is if the doors are opening to let the heat in or if they are stuck closed for some reason.



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