2004 Toyota Sienna Logo
Posted on Jun 16, 2009
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2004 toyota sienna a/c not working one side cold other side warm

A/c in the passenger side and rear blows cold air but a/c on the driver side blows warm air. The cabin of the van really never gets cooled down because of the warm air blowing in from the drivers vent. It's driving me nuts. How do I fix it?

1 Answer

Mike Vincent

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  • Toyota Master 358 Answers
  • Posted on Jun 16, 2009
Mike Vincent
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Joined: May 19, 2009
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There are two a/c lines that run down the fire wall under the van to the rear.right around the bottom of the fire wall the is a connection point on both lines. you will find a leak there .replace the orings and recharge system. also you will need two specail toyota tools to release the couplings.i have done this repair on several sienna's. let me know if this helps.

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Your system is either out of sync on the control, or the air temperature control blend door is not moving due a failure of the door or its actuator motor.
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No heat from vents

As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

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http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

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http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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These will help.

Thanks.

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Toyota sienna blows hot air on driver side and cold air on passenger

It is likely that the actuator on the driver's side is jammed or out of position. Don't worry; the fix is simple and straightforward-remove the negative battery cable for half an hour to reset the computer. Once done, start the AC, and you will be able to hear the actuator adjusting, that's your AC getting ready to blow out some nice cool air.
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One side air/other side ac

I have the same problem. Don't know if the dealer messed it up when they changed the air filter or something else.
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