Question about Chevrolet Cars & Trucks
Posted by Anonymous on
This will most likely be the temperature actuator that is at fault this controls the door inside the havac box.
Posted on Dec 08, 2017
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Posted on Jan 02, 2017
SOURCE: 2001 Chevy s10 with no heat
If you are certain there is no air in the coolant system, then there is a chance that the blend door motor is not working or the heater control assembly is bad. since you have replaced your own heater core you probably noticed the the doors inside the heater core housing. One of those doors is controlled by the "hot/cold" knob. The motor on that door could bad.
Posted on Oct 21, 2008
http://www.cyberbright.com/autobin/air_conditioning.htm Here is a write up on the recharge procedure. Hope this helps,keep me posted, be glad to help. Just be careful not to over charge the system, that will result in a damaged A/C compressor.
Posted on Jun 23, 2009
Had the same thing happen to my truck, the blen door actuator is under the console on passenger side, but the heater core is going to be clogged if you dont have any heat coming through, but a/c works..
Posted on Oct 06, 2009
once truck is warm check both heater core hoses to make sure they are both warm if not then check the cold water valve could be stuck shut not allowing coolant to travel in to heater core.
Posted on Jan 05, 2010
It is possible you have air bubbles in the cooling system. Loosen radiator cap or resivor cap and let idle for about 15 minutes. Tighten cap and drive and see if that helps. REMEMBER TO START THIS PROCEDURE WITH A COOL MOTOR AS THINGS WILL BE QUITE DANGEROUS DUE TO COOLING SYSTEM PRESSURE WHEN HOT.
Posted on Jan 18, 2010
Testimonial: "Hi;Your information confirmed what I thought and bought a new radiator cap and checked over flow hose and tank it is hot again seems fine.Thanks Randy"
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Oct 01, 2013 | 2000 Kia Sportage
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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