Question about 2004 Ford Explorer
Heat problems blowing cold air a/c on when controls in heat setting
You may have it on the defrost setting
Posted on Jan 04, 2015
SOURCE: 2004 ford explorer heating
Check the heater control valve, when u switch to heating mode, this valve is supposed to open, allowing hot engine coolant into the heater core under the dash, it is not opening the valve, the clicking is the sound from it attempting to open the valve.
Posted on Nov 18, 2008
The blend door (mode door ) is a very common issue there is even an associated TSB t(technical service bulletin) it has to do with the blend door becoming warped and binding the accuator. In an opened or semi-closed position
Posted on Nov 19, 2008
The "blend door" or "mode selector door" is stuck. Common problem with Fords. Most auto repair places can fix it. I had mine done at Firestone.
Posted on Dec 30, 2008
SOURCE: Vent control
You have a vacuum leak.Defrost is the default postion(no vacuum).
See if you can locate the small black vacuum line that goes inside the vehicle on the passenger side near the heater core. The trace it back,should see it going to a canister then to the intake manifold.Make sure it is not disconnected or broken somewhere.
Posted on Mar 02, 2009
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