Question about 1994 Acura Legend
The car only blows cold air. Replaced the thermostat. The doors not opening to let hot air in. Think its the denso unit under glovebox. Do you know how to test it to see if it working. There was only one screw holding it up in place and none of the levers were attached. Please help. The car is an 1994 Acura Legend v-6 engine. Also, the a/c compressor stays on all the time. What should I do about that?
Another owner had the door stuck open (hot air all the time). You can remove the fuse for the a/c and see if the switch is bad (on all the time). The door solenoid may be electrical or on some cars vacuum operated. The a/c
compressor on all the time may over-ride the operation of the door for heat.
Posted on Sep 09, 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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