Question about 1998 Dodge Caravan

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HEATER BLOWING COLD AIR, HOSES AND AND OUT OF HEATER CORE HOT, CONTROLS ON DASH SEEM TO WORK

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  • 139 Answers

Need a new thermostat

Posted on Dec 08, 2013

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Posted on Jan 02, 2017

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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

  • 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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2 Answers

Will new thermastat restore heat to my 1998 lincoln markviii lsc collectors edition?


If the engine seems to be running well, the problem is not likely with the thermostat, but with the blend door in the heater control box. These have a tendency to get stuck over time. To see if the have the potential for heat, warm the engine up to normal temperature. Then under the hood, find the heater hoses. They are smaller diameter hoses (about one inch in diameter). There are two of them one runs to the heater core, the other is the return line fell both hoses. If they are warm to the touch (almost hot), then you have coolant thru the core. If only one side is hot, then you may have a clogged heater core. If there is heat on both, the problem is in either the dash controls for the heat, of the blend box under the dash.

Oct 25, 2015 | 1998 Lincoln Mark VIII

1 Answer

03 explorer the right hose to the heater core is hot the left hose is cold. I loosened the left ( cold hose ) and bled off some water and air the heater started warming but not hot so took hose completely...


When you released the cold end, it probably blew out some residue. Remove both hose from the engine and blow it out both ways with a water hose or air compressor. Add water each time, with air. Do this several times. I blow them into a box to see what comes out and when it stops coming out. This helps. Next would be replacing the heater core..All day job for me. I've done it. You have to remove the entire dash board and plenum.

Feb 17, 2015 | Cars & Trucks

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2002 nissan altima heater problem


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

1982 cordoba blows cold air ,no heat inside,the slide bar for hot and cold seems to have broken inside the dash ,how can i get heat in car ,the car has never been winter driven,seems some kind of door...


the valve that control the heat is run by a cable from your heater assembly is located out under the hood,follow the two heater hoses to the fire wall,you will see one hose has a valve in it,one position lets water flow,the other doesn't.

Dec 27, 2009 | 1980 Chrysler Cordoba

2 Answers

Heater is blowing cold air is there a fuse? Or is there a cable that opens to switch it over from cold to hot?


There should be a heater control valve located under the hood in a hose. One hose goes into the firewall which flows through the heater core inside the rear of the dash and another hose coming out and back to the engine. It is probably a bad control valve or maybe the cable is stuck which opens and closes it when you move the knob on the dash. Have someone inside the car move the lever from hot to cold and see if the cable to the heater control valve moves. The rest depends on how handy you are. Should be an easy repair for your local shop.

Nov 30, 2009 | 1994 Oldsmobile Cutlass Supreme

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My heat or my air doesn't work in my 1995 Pontiac Bonneville but it blows good. What could be the issue?


my 2004 pontaic bonneville the heater hoses going into and out from the heater core are hot , but the heater blow cold air. ,

Oct 16, 2009 | Pontiac Bonneville Cars & Trucks

2 Answers

Heater in car doesn't bow hot air but the air condintioning works


Does the car run cold or is the temp. correct. Check the thermostat first. check that the radiator and res. is full. Check the hoses to and from the heater core. If one is hot and one is cold then either the shut-off valve to the heater core is defective or the heater core is plugged.

May 12, 2009 | 2002 Dodge Intrepid

2 Answers

Blowing Cold Air


Sounds like a heater core. Check the passenger side floor board. Sometimes when these go out there will be some water on the passenger side floor. Hope this helps some.

Dec 31, 2008 | 1992 Chevrolet Suburban

1 Answer

No heat


if the heater hoses are hot on both sides(indicating the engine is at full temp) and you feel the heat controller in dash is working properly, i would suggest disconnecting both heater hoses and backflush heater core with decent amount of pressure. if this improves condition but does not solve completely, heater core replacement is necessary.

Nov 15, 2008 | 2001 Mercury Grand Marquis

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