Question about 1998 Ford Explorer
NO MATER WHAT POSITION THE TEMP. CONTROL IS IN THERE IS HOT AIR COMING OUT OF THE VENTS EVEN WHEN TURNED OFF. cold a/c while in driveway but when in motion you can feel the air changing to hot
I had the same problem with my 98 ranger. the problem is the hot cold air blender door. on my truck the the top of the door where the electric actuater is placed broke and no matter what you selected on the controlls you would get hot air. to verify that it is not the A/C place it in the Max A?C position. this will cut off hot coolant to the heater core and you should after a few minutes get cold air. if that works you can find the actuator locaed behond the glove box door on top of theplastic duct next to the blower motor. the only way to fix the problem would be to replace the unit or do what I did I glued the actuater spindle to the blender door. make sure the actuater is in the same position as the door or it wont work.
Posted on May 28, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Temperature Control Blend Door Failure No Heat or no AC (dependes on
where door sticks)
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.
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