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Front heater blows cold only ford tourneo 2008 desel 2.1

Changed the thermostat and heat exchanger flushed the system also changed the electronic switch on the rear of the control panel the cold and hot knob on the panel all ford parts and still blows cold

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6ya6ya
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Posted on Jan 02, 2017

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  • 90 Answers

SOURCE: 2001 tahoe front heater not working, rear heater blows warm air

Notorious for plugged heater cores. Also updated plastic restriction couplers mounted at heater core available from dealer. Try back flushing heater core. Run engine till its at operating temperature then carefully hold the inlet and outlet hose breifly with heater fan on high if hoses are nearly the same temp then flow is good , if not then core is plugged.

Posted on Jan 18, 2009

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mrgreenz
  • 962 Answers

SOURCE: 98 Ford Experdition V8-281 4.6L SOHC-the heat will not get hot.

Have you tried replacing the heater core ? If the flushing of the heater core did not work, the heater core may be bad. Very clogged with gunk and residue. did you try to check the valve that opens the hoses to the heater core. This valve can be vacuum, opened by cable or electric. Check to see if the hoses get hot at the firewall. they should be hot.

Posted on Feb 07, 2009

  • 144 Answers

SOURCE: the rear a/c on my 1996 gmc suburban is blowing

the problem is in the rear expansion valve. this valve is located at the rear evaporator core. i am assuming the freon level has been checked and is ok. this is a common problem with these vehicles. hope this helps!!

Posted on Sep 04, 2009

  • 8 Answers

SOURCE: heater blows cold air, replaced thermostat &

try to back flush the heater core. and if that dont work check the blend door it see if it is working.

Posted on Oct 15, 2009

  • 1 Answer

SOURCE: 1988 Ford F-150 4x4, the heater blows cold air,

I would try to replace the thermostate again, Sometimes these can get damaged in the warehouse. Cheap to try it again, $12-$15

Posted on Jan 04, 2010

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2 Answers

1997 ford expedition overheating problem truck warms up fine heat works good then heat goes cold and temp gauge jumps from normal to overheating i have changed the thermostat twice water pump fan clutch...


This might sound like too simple a solution, but after owning 5 expeditions, I think I may have an idea.

It is possible that the cooling system is simply not full of fluid. If, when changing the thermostat twice and other service, the system was not sufficiently bled or burped, this can happen. What happens is that people do these repairs, and then fill the radiator, but fail to completely flush the cooling system. My son had the exact same problem on his Mazda 3 (Mazda was owned by Ford then), and flushing his cooling system solved his problem.

Think of it this way: If your heater works fine, then goes cold, that usually means the heater coils which the air blows over have no hot fluid in them. As for overheating, your thermostat opens when your engine reaches a certain temperature with the intent to exchange the too-hot fluid with water cooled by the radiator, but if there is only air, or insufficient fluid in the engine after the exchange, you will overheat.

Ask your mechanic to flush/burp the cooling system completely. I hope this works.

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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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unless it is the heater core which you should flush system,,i always boil my new thermostat to make sur it compresses

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Could be your thermostat is staying open and not letting your coolant to heat up,usually this is the first thing to check,also your blend door could not be opening all the way.Here's how to replace thermostat.Here's the blend door.

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See if your library has a Stratus shop manual and check the heating system chapter. You didn't say if the engine was reaching operating temperature or not. If the engine is warm but you are not, I would say the problem is in the heat exchanger somewhere. If your engine is cold, you can't really expect the heater to get warm, now can you. Then you have a different problem to chase.

Lack of water on your floor means your heater core is not leaking. It could still be plugged somewhere. The fact that you get some heat initially, but it turns cold when you turn the fan on, sounds like a lack of adequate warm water to the heater core to me. If the engine is warm, it could be a circulation problem of some sort.

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Heater blows cold


If no coolant flowing through the heater core then ther is no heat. There are 2 possible root causes needed to check out: 1- THE VALVE TO CONTROL THE COOLANT FLOWING TO THE HEATER CORE IS NOT OPENING AS DESIRED. 2- THE HEATER CORE GOT CLOGGED UP AND NEED TO BE FLUSHED.

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Still very low heater output after changing thermostat, water pump. Blend door ok. car does not run hot. takes a long time for temp gauge to read from cold


These Tauruses had a problem with the heater cores plugging up, blowing out the head gaskets and no heat issues. Ford issued a TSB#98B26 (Tech Service Bulletin) to modify water pump and install a heater hose bypass tube. I would start by completely flushing the system with a good flush. Then reverse flushing the heater core. Refill the system and add a good additive. Also you can install the heater bypass tube as described in the TSB. The last one I did ran around $90 and 2 hours labor. Hope this helps you out.......

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you need to check the blend door in the heater box it maybe broken or stuck.the blend door switches between the heater core and ac evaporator to provide a mix of temperature

Oct 18, 2009 | 1998 Ford Taurus

1 Answer

1998 Ford Explorer only blows cold air no heat at all


ok, i had the same issue, your thermostat is stuck open, or you need to check cooling system and the color of coolant, maybe try a flush, go to parts store and get some acid cleaner for flushing your cooling system.....good luck!

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the blendoor on the heater box maybe broken ck lines going to heater core and make sure they are hot. does the heat temp change at all from cold to hot?

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