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Old 01-05-2010, 17:05   #1 (permalink)
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confused No Heat in Ford F-250

Hello,

I have a 1999 ford f-250 diesel. I have a problem with no heat coming from any of the vents. The blender valve is working good. When I turn the temp control to red(heat) there is no change. I have changed the radiator fluid hoping this would solve the problem, however I did not do a complete flush and fill.

any help would be appreciated.
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Old 01-05-2010, 20:21   #2 (permalink)
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Re: No Heat in Ford F-250

Do both heater hoses under the hood get hot when the engine is warmed up?
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Old 01-05-2010, 20:45   #3 (permalink)
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Re: No Heat in Ford F-250

How did you rule out the blend door actuator already? I'm asking a because the parts were poorly made. I just replaced one in my 2002 Mountaineer a few weeks ago. I'm sure it is pretty similar to what you have in yours. But check the heater hoses under hood first. Can you smell coolant in the car, or is any dripping on passenger side floor?
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Old 01-06-2010, 19:22   #4 (permalink)
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Re: No Heat in Ford F-250

yes they do get hot
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Old 01-06-2010, 19:26   #5 (permalink)
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Re: No Heat in Ford F-250

I ruled out the blend door actuator by noticing the movement under the dash. the heater hoses are hot, i really do not smell coolant inside the cab and there is no dripping.

thanks for your help
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Old 01-06-2010, 20:08   #6 (permalink)
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Re: No Heat in Ford F-250

You can't really see the blend door move. It still could be the actuator. You don't have to pull the instrument panel to change it.
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Old 01-06-2010, 23:22   #7 (permalink)
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Re: No Heat in Ford F-250

Quote:
Originally Posted by rtg143 View Post
You can't really see the blend door move. It still could be the actuator. You don't have to pull the instrument panel to change it.


Sounds like a blend door issue to me. Whaddya think? I used these videos to help me access the actuator without removing the dash. I'm sure there's a similar one for the truck.


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Old 01-07-2010, 06:53   #8 (permalink)
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Re: No Heat in Ford F-250

so the actuator is located on the passenger side under neath the dash--white looking component with a connector attachment? Making sure we are on the same page
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Old 01-07-2010, 09:02   #9 (permalink)
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Re: No Heat in Ford F-250

That white looking thing is the actuator. More toward the middle on the passengers side.
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Old 01-07-2010, 11:19   #10 (permalink)
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Re: No Heat in Ford F-250

I was wondering if I flush the coolant system could this my chance be the cause such as a clogged heater core?
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