2002 TOYOTA
100,000 MILES
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MYLONA78
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i have a 2002 Toyota Allion 1nz-fe model , its strange when i turn on the heater after the car warms up the two left air vents are hot but the right two air vents are slightly cooler do you know why ? can anyone help ?
Dec 10, 2012 at 4:18 PM
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KHLOW2008
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Check the vents and air mix door operations.
Dec 10, 2012 at 9:57 PM
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MYLONA78
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i check the vents their is nothing obstructing them .. i have also checked the air mix servo which is 1 in the car not 2 and its working ok , what else do you think would be the problem ?
Dec 11, 2012 at 11:31 AM
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KHLOW2008
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Did you check if the vents are closing fully? Any leakages would result i the problem described.
Dec 11, 2012 at 2:40 PM
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MYLONA78
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em no .how do i check if the vents close fully?
Dec 11, 2012 at 4:21 PM
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KHLOW2008
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Visual inspection is required to verify if the blend doors closes fully and note if sponges are torn, tatterred.

Are the air flow similar for both right and left?
Dec 11, 2012 at 4:47 PM
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MYLONA78
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yes the blend doors closes fully. sponges are ok
Dec 12, 2012 at 4:41 AM
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KHLOW2008
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Are right and left air flow similar in volume?
Was anything done prior to this occurring?
Did you check the air flow ducts for leakages?
Dec 12, 2012 at 8:36 PM
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MYLONA78
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when i have it on cold all 4 ducts are similar in voluume . when i turn it to hot the 2 left one pump out much more air tha the right ones. the far right nearly no air volume .. why its funny . nothing was done .. i checked for leakages but nothing all seems ok.
Dec 13, 2012 at 5:00 PM
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KHLOW2008
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The air distribution vents seems to be at fault and the heater housing might have to be disassembled to check/repair.
You mentioned a one air mix actuator. Check the actuator linked vents for damage.
Dec 14, 2012 at 10:32 PM
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MYLONA78
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tes but to do that i have to open my heater box correct ?
Dec 21, 2012 at 6:24 AM
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KHLOW2008
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If you can't see anything externally, I am afraid that is what you need to do.
Dec 21, 2012 at 12:56 PM
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MYLONA78
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ok thank you , if i solve the problem i will post you
Dec 21, 2012 at 1:38 PM