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Intermitten Heat (A/C) Problems

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Old Feb 21, 2010 | 05:43 AM
  #1  
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Intermitten Heat (A/C) Problems

Hey All,

I have a '03 CC F250 7.3L.

I am finding lately that I am having intermitten issues with heating the cab (after the engine has reached optimum temp). Sometimes the heat works, sometimes it does not. Toggling the output from defrost, to floor, to vents seems to help fix the issue at times (and not at other times).

Has anyone else seen this, and if so found a resolution?


Could it be the "blend door" that I have seen some people talking about or is it possible the heating core is going to have to be swapped?


Thanks for the help!
 
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Old Feb 21, 2010 | 06:38 AM
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I would be looking at the operation of the blend door. Usually (don't quote me) it works off of vacumn. But the door may be bad.
 
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Old Feb 21, 2010 | 07:01 AM
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Have you checked the coolant level. That would be step 1.

Rick...
 
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Old Feb 21, 2010 | 07:25 AM
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When the heat "does not work" what symptoms are you seeing? No fan? Is it blowing out the defrosters? Air but no heat?
 
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Old Feb 21, 2010 | 09:23 AM
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Originally Posted by _Rick_
Have you checked the coolant level. That would be step 1.

Rick...
That was my first thought as well!
 
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