Question about 2002 Nissan Altima
My temperature control konb on my console won't turn to heat - only to air - it is like it is stuck -
More than likely the teeth on the gear in the back of the unit are broken. you have to buy a whole new unit with all 3 controls. this will run about 130-150$
Posted on Nov 05, 2008
This usually indicates there may something wrong with the heater control head itself or an actuator has jammed, or gear teeth broken. depending on if its a cable or vacuum operated system
Posted on Oct 24, 2008
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Posted on Jan 02, 2017
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Apr 16, 2017 | Cars & Trucks
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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