Question about 1983 Honda Accord
Cannot move heat/cool control to full cool or full heat.
Therfore, cannot obtain full temperture range for both
heat & cool. Need to locate where cable movement is
Takes a bit of crawling and looking upside down, but can be done. Cable leaves controller and curves along some sort of pathway to the heater blend/door probably on top of the HVAC box. SHould end up on passenger side, I think. You should find this cable's end with a loop on it attached to a lever that works the hot/cold door. Check if door moves freely with cable unhooked from door end. If so, move controller and feel looped end with your fingers. Still stiff? Proceed:
Cable can be fed out of dash and lubricated, but I've seen many that were just ready to be replaced. They are cheap to special order, and once you get it out, you'll know if it was a rough pathway, or a bad cable, or a sticky door. Sometimes the button that secures the far end to the box and holds the cable housing stationary can get loose and pop partially out of its slot, too. Hope that helps, TaterTodd
Posted on Jan 27, 2009
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Posted on Jan 02, 2017
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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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