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Why is hot heat blowing from floor and cool heat is blowing from upper vents in 2000 ford expedition even after changing potentiometer and blend air door switch and is not very hot as before?
Wiki User
∙ 15y ago
The most common failure with this model if for the blend door connection to break, leaving no control over regulation of heat. Check my answer to other questions on this forum for information on how to access and check the blend door.
If the problem is regulating between defrost/vent/floor, this is controlled by the mode door. This door is vacuum actuated and failures are usually a vacuum leak somewhere in the system.
If the problem is strictly temperature control, I can almost guarantee that the problem is the blend door. This is common on this model and you will find that the dealer wants an arm and a leg to fix it. HeaterTreater has a cheap fix.
Wiki User
∙ 15y ago
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