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I have a 2002 Toyota Allion 1nz-fe model, its.

Tiny
MYLONA78
  • MEMBER
  • 2002 TOYOTA
  • 100,000 MILES
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?
Monday, December 10th, 2012 AT 4:18 PM

12 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the vents and air mix door operations.
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Monday, December 10th, 2012 AT 9:57 PM
Tiny
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?
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Tuesday, December 11th, 2012 AT 11:31 AM
Tiny
KHLOW2008
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Did you check if the vents are closing fully? Any leakages would result I the problem described.
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Tuesday, December 11th, 2012 AT 2:40 PM
Tiny
MYLONA78
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Em no. How do I check if the vents close fully?
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Tuesday, December 11th, 2012 AT 4:21 PM
Tiny
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?
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Tuesday, December 11th, 2012 AT 4:47 PM
Tiny
MYLONA78
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Yes the blend doors closes fully. Sponges are ok
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Wednesday, December 12th, 2012 AT 4:41 AM
Tiny
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?
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Wednesday, December 12th, 2012 AT 8:36 PM
Tiny
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.
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Thursday, December 13th, 2012 AT 5:00 PM
Tiny
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.
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Friday, December 14th, 2012 AT 10:32 PM
Tiny
MYLONA78
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Tes but to do that I have to open my heater box correct?
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Friday, December 21st, 2012 AT 6:24 AM
Tiny
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If you can't see anything externally, I am afraid that is what you need to do.
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Friday, December 21st, 2012 AT 12:56 PM
Tiny
MYLONA78
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Ok thank you, if I solve the problem I will post you
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Friday, December 21st, 2012 AT 1:38 PM

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