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  #1  
Old 07-31-2012, 08:10 AM
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Center left vent only blows air??

2002 JGC Limited AZC 4.7 125k on body 65+k on the motor

I have a problem with my HVAC system. My AC is COLD COLD!!!!!!I know my blend doors need help because only the pass side can go from hot to cold but i still only get air through my center left vent mostly. The others barely have any air flow. I dropped the blower motor yesterday and the recirc door is working fine. When I did the diagnostic, i got codes 52 and 54. What should me next step be?
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Old 07-31-2012, 08:36 AM
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Re: Center left vent only blows air??

also what direction should the blower motor spin?
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Old 07-31-2012, 11:23 AM
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Re: Center left vent only blows air??

anyone?
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Old 07-31-2012, 01:47 PM
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Re: Center left vent only blows air??

cant be the only one with this problem
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Old 07-31-2012, 09:19 PM
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seems like these gc blow 100% out center two vents but outside vents blow 50%.., I been told its a "normal " issue ....but if you feel doing more diagnosis tear apart dash and look into hvac box for flap doors

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Old 07-31-2012, 09:39 PM
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Re: Center left vent only blows air??

The center vents indeed get most of the air, but if the left center one gets more air then the right center one, that is strange. Is the right vent not partly closed?
There where some members who after the blower motor controller change hardly had any air from any of the vents. The wires where wrongly connected and the blower motor was running in the wrong direction. Canīt tell you though which direction is the right one. But if you get lots of air from the center left vent, i would say that the blower motor direction is ok.
Regarding the 52 and 54 codes (respectively recirculation door and left blend door travel too large), i would start disconnecting the battery for a few minutes to errase the memory and see if both faults come back again. if yes, then you probably have broken end stops on those doors and/ or broken door hinges.
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Old 08-01-2012, 02:22 PM
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Re: Center left vent only blows air??

well i removed some panels on the ds and the mode function does not not work..... it doesnt move at all. So im gonna try to replace the actuator and see if that helps...
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Old 08-01-2012, 08:00 PM
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Re: Center left vent only blows air??

Strange that the mode door actuator doesnīt work, but you donīt get any fault code for it. Is the mode door stuck somewhere in between? Not sure if all actuators are the same, otherwise you could swap it with an other one?
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Old 08-02-2012, 08:17 AM
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Re: Center left vent only blows air??

i have a 2 broken act...the ds blend door motor is broken and so is the mode door motor..
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Old 08-02-2012, 10:51 AM
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Re: Center left vent only blows air??

Are you sure the actuators are broken and not the control signal of the actuators is missing? You could manually control these actuators without the control function from the AZC.
Attached the way to do it, if you select pointer number 22 (for the mode door) and 32 (for the drivers blend door actuator), you can manually control the actuators.
Attached Files
File Type: pdf actuator test1.pdf (70.0 KB, 7 views)
File Type: pdf actuator test2.pdf (25.9 KB, 6 views)
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