Question about 1997 Dodge Ram 1500 Club Cab

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Heater core just replaced, and still no hot air???

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 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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greg_margo
  • 1959 Answers

SOURCE: my kid has a 96 neon i've replaced the radiator

If you're not losing coolant, it's much more likely to be the water pump. Most heater cores leak when they go so although it's not impossible, I'd be very surprised if the heater core was even partly to blame for your overheating problem.

Posted on Sep 05, 2009

  • 17 Answers

SOURCE: heater blowes cold air replaced heater controls

It seems to me if your heater core is hot, and the fan blows cold air, then your ducting is closed off. Try and see if your duct door is opening up. You say you changed out your controls, but it sounds as though it wasn't your controls that were bad, but what they control is not opening up.
It's all well and good that the heater core is getting hot, but if the fan cannot deliver that hot air passing through it, then walah.
It has to be an air duct obstruction. Either the ducting is collapsed, the duct door is not opening, or you have some obstruction blocking the ducting. My guess, because that is all I can give you without seeing for myself, is that the linkeage or solonoid that opens the duct door is not working. Older cars had a cable, but I believe newer use a solonoid to operate the opening and closing of the door. The door is there so you don't get the heat from the core when you are using AC.
Hope this helps.

Posted on Sep 19, 2009

  • 365 Answers

SOURCE: Heater blows out warm air on low but cold air on

Have you checked to see that you have antifreeze up to the proper level. That is always the first thing to check when cold air blows out the heater when you have the heat on.

Good Luck

Posted on Dec 15, 2009

  • 144 Answers

SOURCE: Heater does not get hot. Air blows out but never

Hi, are any of the heater hoses getting hot at the heater core.If both hoses or hot you have a blend door problem.If one hose is out and the other is cold you have a stopped up heater core, if both or cold you have a restriction in cooling system or a weak water pump. Have you tried to flush the cooling system. Thanks if i can help just re post.

Posted on Jan 07, 2011

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2 Answers

Mt car blows cold air but not hot i replace the thermostat and added antifreeze but it still no hot air its for a Mitsubishi lancer 2003


there are two hoses than run through the firewall to the heater core. With the car fully warmed up those two hoses should be about the same temp. If one is hot and one is significantly cooler that the heater core is likely plugged. The hoses can be removed and the heater core can be backflushed with a garden hose. do this several times alternating between the inlet and outlet of the heater core. reconnect the hoses and see what happens. Worse case scenerio you'll need to replace the heater core.

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The heater is blowing cold air when on hot setting, thermostat replaced?


Could be a few problems causing this. Check to see if both heater hoses are hot going into and coming out of the heater core from under the hood. If both hoses are hot then there is an issue with the blend door/s inside the heater box assembly. If only 1 hose hot at the heater core and the other hose warm/cool you most likely have a heater core restriction and a back flush will be required. If no hoses are hot at the heater core then you have air in the system or the coolant level is low

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2005 Mitsubishi galant heat doesn't work. Blower works and air conditioning work but no heat comes out. Coolant is full. Just feels like outside air temp with heat on hot.


Your thermostat may be stuck open and your coolant isn't getting hot to warm the cab.Here's a link on how to replace,very easy to do.Don't let your pets near spilt coolant,will kill them.

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The heater isn't putting out hot air


check to see if there is plenty of antifreeze in radiator , may have a air bubble in system .

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2001 FORD EXPEDITION XLT 4.6L V8 BLOWING MILD WARM BUT NOT WARMING THOROUGHLY. HAVE FLUSHED COOLING SYSTEM THREE TIMES, AND CHANGED THERMOSTAT. HAVE ALSO REMOVED DASH AND REPLACED "BLEND DOOR" AND BLEND...


You hot air comes from the water circulated through the heater core. It is like a miniture radiator with water flowing thru it constantly. So by opening the "Blend Door" you are permitting so much of this hot air to pass thru.

Seems like for some reason your heater core is plugged up. Just like a radiator can be. So water may be passing through your heater core but not passing through fully. Your heater core gets hot from water passing throught it from the engine. Then your doors open up, in proportion to how much air is permitted to pass over the heater core.

Suggest to remove the heater core and replace it. Seems the blend doors are working properly but again, if you have a non working heater core then no air can pass over the "Hot Core" for you to recieve hot air.

If you are not mechanically inclined, then go to a local parts store and you can buy a car manual, such as Chilton's or Hane's Car manuals, for your year and make to show you how to replace it. Then you can also have it for any other problems that may arise.

Jan 24, 2010 | 2000 Ford Expedition

2 Answers

My 99 Blazer won't blow hot air. The Heater core


The problem was a vacuum line leak. Replaced the line.

Dec 30, 2009 | 1999 Chevrolet Blazer

3 Answers

I have changed the theromast twice and flushed the coolant system.The heater core is not leaking.. the blower is still blowing cool air.


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

Jan 13, 2009 | 2003 Ford Expedition

1 Answer

Heater cystem


Heater Core is blown so now it's not producing Hot air just cold! Same thing happened in my 96 Jeep. You have to replace the heater core.

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