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04 ford explorer heater blows cold coolant does not circulate

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  • Ford Master
  • 3,349 Answers

Number 12 is heater control valve. Number 11 is vacuum line, full vacuum and the valve will shut off coolant flow. I can't say the valve is the problem? Maybe the heater core needs to be flushed? When you say coolant doesn't flow, you mean through heater core?
04 ford explorer heater blows cold coolant does no - 26386563-zoyd2ay4ajnqri3x4p5ocmly-3-0.jpg

Posted on Dec 05, 2016

6 Suggested Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 93 ford festiva heater only blows cold air.

The heater only blows HOT air when set on defrost or floor settings. If you have the lever set for vent, only cold air will come out. Check to make sure you set the controls to floor or defrost. This is standard for all Festiva's.

Posted on Nov 16, 2008

alicantecoli
  • 22114 Answers

SOURCE: Ford Expedition 2002 Front Heater blows cold air below 45 MPH

impeller is made of plastic on teh water pump and its slipping and spinning on the shaft renew before weather warms up as engine will overheat

Posted on Jan 01, 2009

onyeredson
  • 404 Answers

SOURCE: 04' Passat Overheating

Hi!
It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.
If persistent boil ups/over attention must made in the cylinder head
or gasket area, or possibly water pump?
Please press the Blue button to appraise my FREE Efforts, Thank You!
Paul 'W' U.K.

Posted on Mar 02, 2009

Mike258
  • 1498 Answers

SOURCE: my heater only blows cold air-'98 ford explorer

Hi Bri,

That is usually the first symptom of low coolant. Not enough water in the system to circulate through the heater core. Has it been running hot?

Check the coolant level in the radiator

Best regards,
Mike

Posted on Sep 23, 2009

emissionwiz
  • 75744 Answers

SOURCE: 2000 Ford Taurus heater blows cold air ?

this problem is caused by a part called the "temperature control blend door actuater motor" this litttle motor drive moves the door that diverts air over the heater core or AC evaporator core, when it fails it almost alwys fails in the AC only position, u will need to have the motor drive replaced

Posted on Oct 16, 2009

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1 Answer

I have just purchased a 2008 ford transit 330. It is a nice van except the heater only blows out cold air. I have checked the thermostat with a kettle of boiling water it opens and closes fine. So I'm


check the control module that opens the heater hoses tap. Check for air blockage in the cooling system that will not allow the coolant to circulate around the heater. Loose the highest hose and run until only coolant comes out . Refill the radiator.

Feb 11, 2014 | Ford Transit Cars & Trucks

1 Answer

Heater blows cold on idle


If this is after the engine has already been running a while, it could be a issue with the thermostat staying shut, water pump failure, or some kind of blockage or restriction in the cooling system causing the coolant to not circulate through the heater core

Jan 08, 2014 | 1999 Ford Explorer

1 Answer

The heater is blowing out cold air.


First, check if coolant is low, as that is often the cause of loss of heat.
Check if the heater core is leaking-if floor on passenger side is damp, it may be leaking. Changing out a heater core can be very easy or very difficult, depending on the design. On some more difficult ones, the entire dash has to be removed. I hope not in your case.
When coolant is full and engine warmed up, feel both heater hoses. Both should be hot, indicating the core is circulating coolant.
Keep looking for a leak, if you keep smelling coolant or have to keep adding.

Dec 10, 2013 | 2001 Ford F-150

2 Answers

1997 ford explorer... My heater is only blowing cold air. The heater core and tubes get warm to hot, the temp control knob works. Is there any time of short term quick fix i can do till i have the money to...


If the thermostat is not opening (coolant circulating) and getting coolant through the inlet hose of the heater core you will not get any heat. If the thermostat is working then the heater core is clogged. Some folks take the heater inlet and outlet hose off and flush each end with a garden hose, got to give it enough pressure to unclog the core.

Nov 21, 2013 | 1997 Ford Explorer AWD

1 Answer

Front heat works, but rear blows cold air only


With your front heat working the most likely cause for the rear heat not to work is that there is an obstruction in the line that is preventing the warm coolant to get to the rear heater core or the rear heater core itself is plugged and not circulating. Another possible cause could be low coolant level where the system has enough coolant to provide the front system with enought warm coolant but not the rear system. Hope this helps

Dec 30, 2009 | 2004 Ford Expedition

1 Answer

2005 ford explorer will only blow cold air no matter what ther thermostat is set at, and it makes a clicking noise when it is on, why is this....please help.


You may have a thermostat that is stuck closed.  If it doesn't open, hot coolant cannot reach the heater core, thereby blowing only cold air.

Oct 10, 2009 | 2005 Ford Explorer

2 Answers

My heater only blows cold air-'98 ford explorer


Hi Bri,

That is usually the first symptom of low coolant. Not enough water in the system to circulate through the heater core. Has it been running hot?

Check the coolant level in the radiator

Best regards,
Mike

Sep 22, 2009 | 1998 Ford Explorer

1 Answer

Temperature Control not working on 1999 Ford Explorer


Sounds like your temperature actuator is not moving or your temp door is broken. On max a-c ,coolant is shut off to your heater core allowing only cold air in.

Jan 16, 2009 | 1999 Ford Explorer

1 Answer

Engine hot ... heater cold ?


Check the coolant level, it could be as easy a fix as adding coolant because it's low. Low level causes engine to overheat, and low level won't circulate to heater core, so no heat situation even though engine is running hot. Let me know if this fixes it, if not I'll help .

Nov 28, 2008 | 2000 Ford Taurus

2 Answers

Heat when the fan blow at 2 but cold if the fan is at 3 speed


1st make sure the heated core is getting hot, do this by feeling the hoses under the hood that supply hot coolant to the core, if the inlet and outlet are hot then the core has circulation and is not the problem, check this and let me know what you find.

Nov 17, 2008 | 2004 Ford Explorer

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