2004 Ford Freestar 3.9 heat is "luke warm"...??


Asked by Nov 19, 2013 at 04:45 PM about the 2004 Ford Freestar SE

Question type: Maintenance & Repair

I have a 2004 Ford Freestar 3.9 V6.  My heat is "luke warm".  I've replaced the thermostat, it didn't help.  I'm not losing coolant anywhere.  The coolant looks fairly "gunky" though.  I want to try to flush my system.  Can someone give me some pointers on the best way to do this?  A mechanic told me there is a good chance something is blocking flow to my heater core.  I'm looking for specific steps on how to flush it.  I do have a good size air compressor.  Is it better to use air or water?  The "temperature door" seems to be working ok (it changes from cold to warm).  Any input would be appreciated!

4 Answers

Tom Demyan


10 out of 10 people think this is helpful.

Hi Tom, Thanks for the info...only problem is it's for a freestyle and not a freestar. Looking at the pics, I believe my cooling system is different...??

1 out of 1 people think this is helpful.
Tom Demyan

Sorry, but use the same principal.

Tom Demyan

The best way is to get the Prestone flush kit, however that requires access to heater hoses, cutting and inserting the adapters, and that is not easy as they are up against the firewall. The trick is to drain, fill, drain, fill. You can drain the cooling system (except for water jackets) by opening the drain petcock on the radiator, fill with fresh water and run engine, I usually only run it about 5 minutes the first time around. Repeat this again usually the water comes out very light in color. Fill it again and let it run until thermostat opens, let it cool and drain again.Then fill radiator with coolant and until full, without engine running. Water in the engine and hoses will mix with the coolant you added into the radiator. Use a tester to determine if you have the proper 50/50 mixture.

Your Answer

Add photo

Related Questions

  • no heat coming from vents... 34 answers

    I have this problem since friday.... when i accelerated to go up a hill, i think there was a leak coming from the pressure tank. i lost all heat and the next day the engine temp went hi and normal and...

    2004 Ford Freestar


    Maintenance & Repair

  • heating 1 answer

    My wife has a 2002 Ford Taurus SE. In the summer the AC works fine but, in the winter the temperature hand goes up and down and it will only get warm. I changed the thermostat; no help. The overflow t...

    2002 Ford Taurus SE


    Maintenance & Repair

  • Why isn't heat blowing in my 2001 ford expedition?? 2 answers

    I have a new ford expedition and the air motor comes on but heat never comes out, only cold and luke warm air. The thermostat has been changed, their is no problem wit my heater cord as far as I can...



    Maintenance & Repair

  • 1999 ford expedition blows luke warm heat throw the vents in the front cold in the backont 2 answers

    1999 Ford Expedition 4 Dr XLT SUV


    Maintenance & Repair

  • no heat 4 answers

    The thermostat is at 110 and it is not getting hot so Im not getting any heat. I have luke warm air coming through the vents. There is antifreeze in there. It is blowing air out but not hard

    2004 GMC Envoy 4 Dr SLT 4WD SUV


    Maintenance & Repair


Looking for a Used Freestar in your area?

CarGurus has 924 nationwide Freestar listings starting at $2,300.


Search Ford Freestar Questions

Ford Freestar Experts

#1 Tom Demyan
Tom Demyan
Reputation 340
#2 beartraxx33
Reputation 210
#3 FordNut
Reputation 170
View All

Related Models For Sale

Used Chrysler Town & Country"
835 Great Deals out of 22,475 listings starting at $1,495
Used Ford Freestyle"
12 Great Deals out of 846 listings starting at $1,500
Used Honda Odyssey"
418 Great Deals out of 26,348 listings starting at $999
Used Dodge Grand Caravan"
428 Great Deals out of 30,221 listings starting at $1,650
Used Toyota Sienna"
367 Great Deals out of 25,533 listings starting at $600
Used Ford Windstar"
1,173 listings
Used Ford Focus"
1,158 Great Deals out of 57,399 listings starting at $1,495
Used Ford Explorer"
1,333 Great Deals out of 71,185 listings starting at $985
Used Dodge Caravan"
1,081 listings starting at $3,990
Used Kia Sedona"
173 Great Deals out of 9,669 listings starting at $2,500
Used Mercury Monterey"
188 listings starting at $1,500
Used Ford F-150"
3,170 Great Deals out of 215,803 listings starting at $1,000
Used Ford Taurus"
329 Great Deals out of 23,107 listings starting at $1,400
Used Chevrolet Suburban"
642 Great Deals out of 24,260 listings starting at $2,000
Used Ford Expedition"
585 Great Deals out of 21,300 listings starting at $2,111