Question about 2003 Dodge Caravan

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We turn on the heater and its hot for the 1st minute, then its cool. What could it be?

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Low coolant (not filling the heater core), or needs a heater core flush (to produce more flow into the heater core). Some possibilties for starters... Have you had the coolant flushed at all before? The fact that it is an '03 leaves for possibilities that it is due. A flush by a garage would some the problems above.

Posted on Sep 30, 2010

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2000 caddy Seville ...after starting and engine warm turn on the heater and it blows cold air. Fan works / waiting for hot air and then all the sudden it kicks in. Engine at normal temp


Low coolant, if there is an air pocket in the engine it will make it to the heater core. Once there , the air coming out is cold/cool. Once the coolant fills the heater core, it gets hot. If the coolant is fine hot or cold, then have the HVAC system scanned.

Oct 09, 2016 | 2000 Cadillac Seville

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Why when I turn on the heat it gets cold after a few minutes


Air in cooling system? Blockage? Thermostat failing? Collapsed hoses. there are many reasons why this problem exists. Hot coolant passes through your heater core which is generally located on the firewall of the car. If hot coolant does not circulate into the heater core, it will not pick up the heat and your car heating system will blow cool air. Coolant circulation is most likely the underlying issue. Your water pump may also be failing.

Sep 21, 2012 | 2006 GMC Envoy Denali

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Drained radiator added prestone Radiator flush refilled and started overheating, drained radiator replaced thermostat and now I get no heat from heater,Radiator water is hot


disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

May 08, 2012 | 1995 Toyota 4Runner

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My heat does not work it blows cool air i have checked heater core ,changed thermastate. it blows a little heat on floor but none thru vents. then i hear somting like a flap opening and closing by the...


You may need to flush your cooling system, here's how you can tell.

With the heat off, start your engine and let it run for 6 to 8 minutes, ( this allows the engine to get to the normal operating temperature )

Turn your heat wide open and wait 2 or 3 minutes. Now turn the engine off, reach behind the engine on the firewall, you should see two small hoses, ( about 1 inch or so in diameter ), carefully feel both hoses, both should be hot if the coolant is passing through the heater core. If only one of them are hot then the coolant is not passing through the heater core and you have some kind of blockage. If this is the case then flushing the cooling system usually works.

I hope this helps you.

Feb 02, 2011 | 1999 Chevrolet Tahoe

1 Answer

After replacing timing chain in 89 toyota 22-re my heater hasn't blown very hot air. I've changed thermostat and flushed coolant lines. I used to have an awesome heater but now when I turn blower full...


yes a bad water pump will cause it not to circulate the coolant through the heater core,find your coolant leak 1st is it leaking into the cab on the passenger side of your truck? thats another sign of a bad heater core also.make sure that you don't have an air pocket in your cooling system.it has to be full for the heat to work properly.thank you for choosing fixya.com

Jan 10, 2011 | 1988 Toyota Pickup

1 Answer

Car heat takes 10 to 15 minutes on a 2005 dodge


could be clogged up heater core or the heating helper element ..if you look for the heater air box you should see a 3 wire plug with i believe its 2 screws on it remove it and start the car and have someone hold it {not the coil wire ends and turn on the heat it should glow red hot this is the heater coil helper you may also have insufficient antifreeze remove radiator cap and check fluid levels also while your there feel the top and bottom hose to see if they both get hot and that you feel water in them but 1st ensure the radiator is full if just the top hose going into the heater-core to the firewall is hot and the bottom one is cold you should have a radiator flush to dislodge the Gunk buildup in the heater core .

Dec 07, 2009 | 2005 Dodge Grand Caravan

1 Answer

Hot air blows but cools down in 15-20 seconds.


You likely have a restriction in the heater coolant hose circuit - perhaps a coolant control valve not fully opening, or a kinked hose.
Insufficient coolant volume is flowing to keep the heater core hot.
Try back flushing the heater core system with a garden hose to check flow.

Nov 13, 2009 | 2003 Audi A4 Cabriolet

1 Answer

MY 1998 FOR TARUS HEATER WILL NOT WORK.WAS DRIVING


It is most probably the problem with blend door or blend door actuator. But just in case I would suggest to follow the entire procedure:

First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is warm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest flushing the heater core.

Oct 17, 2009 | 1998 Ford Taurus

2 Answers

My 2003 xtype battery went dead and I had to replace it and now my ac doesn't work, blows only hot air and it was working fine before.


your computer needs to be reset.. go out turn the car on. turn the air all the way up as hot as the temp will go, let it run there long enough fro the heater to get hot... then turn it all the way down to the coolest temp and hit ac it will cool down.

Aug 25, 2009 | 2002 Jaguar X-Type

2 Answers

Heater temperature does not stay hot


1st thing to check is the coolant level. I've seen cars w/ no heat, or very little quite a few times caused by low level in cooling system--not low enough to overheat the engine, but enough that circulation of coolant to heater core is affected (no or little hot coolant circulation to heater core=no or little heat),
Is the engine temp gauge in the normal range? If it's in the low range, engine not reaching operating temp. it could be caused by a thermostat stuck in the open position (or no thermostat, sometimes people remove them when their car overheats, and this should not be done).
Here's how the system works: the heater 'box' contains a heater core (a mini radiator) w/ a fan and hoses connecting the heater core to the engine cooling system. Hot engine coolant is circulated thru the heater core. When u activate the heat switch on the dash, a flap door opens to expose the heater box to the passenger compartment. The fan switch on the dash activates the fan, which blows air thru the core, which heats the air.
So, if it's not the coolant level at the radiator, the fan is obviously working, the engine is reaching operating temperature, I would say it must be the flap door that opens, isn't opening fully, or isn't staying open. It could be the dash switch is defective (not supplying current to open flap door) or less likely the flap door is binding somehow. Hope it's as simple as correcting coolant level, if not, the dash switch control should be checked

Oct 22, 2008 | 2004 Dodge Caravan

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