Question about 2004 Ford Freestar

2 Answers

No heat changed thermostat, still the same. one line is hot, line coming from thermostat housing area, other line is cold. when you adjust the temperature range inside you can hear the door adjusting air flow.

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  • Ford Master
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The cold line is your return line from the heater core. The core is not circulating, as it should. Is there a water valve anywhere in the heater lines? If so, check that it is open-it should open when a heat setting is chosen. If no valve, the core may be plugged or have an air block. Try cracking open the cold return line to see if you can start flow. If you can't, one must assume the core is plugged, see if you can backflush it with a garden hose-the coolant will need draining to a low level first.

Posted on Jan 13, 2013

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  • Ford Master
  • 14,379 Answers

Check to see if this is working.

Posted on Jan 13, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 41 Answers

SOURCE: Truck heater is stuck ON

There is a blend door motor on top of the housing. If you open the glove box, and look to the top of the housing near the left rear of the glove box, you should see the blend door motor. You can check it at this point. Also check the housing, as I have seen a number of these with a damaged or broken housing.

Posted on Nov 10, 2008

  • 2 Answers

SOURCE: Hot air coming out of vent when air is on.

put some frion in and change out the antifreeze

Posted on Apr 19, 2009

  • 3 Answers

SOURCE: hot and cold air not changing on 1999 ford expedition

THE CHANGING ARM ON THE DOOR THAT BLOCKS EITHER HOT OR COLD HAS CORRODED AND PROBABLY FALLEN OFF. OURS DID THIS AND WE HAD TO HAVE THE ENTIRE DASHED REMOVED FOR A NEW ONE TO BE INSTALLED.

Posted on May 05, 2009

  • 137 Answers

SOURCE: Replace thermostat and flushed system. Air flow is

you need a new heater core

Posted on Jan 20, 2010

  • 836 Answers

SOURCE: Heater in 1994 taurus blows cold air . Replaced

Sounds like the heater core is clogged, try back- flushing it with water [ careful - use very low pressure ] .

Posted on Jan 24, 2011

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1 Answer

91 Nissan Sentra major oil leak , over heating help please


You'll have to get underneath the vehicle to see where the leak is coming from. If you can find the general area I might be able to help to narrow it down.

Do you have to add coolant to the engine from time to time?

To find the thermostat, follow the top radiator hose to where it connects to the engine, this is the thermostat housing. Remove the 2 bolts which hold it on and replace the thermostat.

** only do this on a cool/cold engine. Otherwise the hot coolant could cause sever injury.**

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You may have got a defective thermostat if its sticking 2 lines would be hot and the other two cold

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Faulty coolant temperature sensor and a faulty heater control valve.

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CHECK and ADD ANTIFREEZE if needed. change thermostat, check the vacuum line to be sure the temp control is switching from cold to hot first.

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I have a bmw e46 318i se when i start the car the fan comes on straight away weather its cold or hot, i run it up and it doesnt over heat and drives perfect, BUT THERE IS NO HOT AIR COMING OUT THE BLOWERS,...


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No heat in my 2002 chevy s-10. Already changed


The heat is controled by a control valve installed in one of the heater hoses. It normally is controled by eather a vaccuum line or a cable coming from inside the truck at the dash where you slide the hot to cold adjustment.Find the valve under the hood at the hose,have someone move the control inside the truck.If its vaccuum you can pull off the hose and see if you have vac.If its a cable you should se it move.

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My VW Cabrio is overheating after 1-2 miles. Coolant in recovery tank is boiling by this time and making bubbling noises. Someone changed radiator hoses, flange, some housing. They are saying that radiator...



Run the engine and look at the header tank , is there lots of air bubbles coming back out of the water if is then the head gasket may have split and that is down to either a can of Radweld or a strip down repair

If the radiator is not uniformly hot them I would go for that as your problem

Normal operation is that the engine starts the thermostat is closed , engine block heats up and opens water starts to circulate around the block

So to check that you need to fill the radiator with cold water run it for a few minutes check the bottom hose it should be cold

The stat opens and the bottom hose should get hot as the water from the block is pumped into the radiator for cooling.

The radiator should get hot all over and the cooling fan should kick in when the sensor hits the over limit stop.

If that does not happen then get someone to remove the stat altogether (It is only there to get the engine block warm quickly in cold regions )

In which case the bottom hose should go from cold to warm to hot

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Low to No Heat in 1998 Dodge Durango


Provided you bled system good with rad cap off & coolant in rad isn't low, i suspect blend/air door may be malfunctioning, perhaps from a vacuum leak. You might be able to feel or see by reaching in behind dash from driver side, and look for vacuum lines & a plug going into the control. Listen for a "hiss" noise anywhere in that area as well. If you can follow the lines, would help, and pay special attention for vacuum line where it enters firewall on outside in engine area & follow it back to vacuum source too.

Mar 02, 2009 | 1998 Dodge Durango

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