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Super Mechanic
Super Mechanic, ASE Certified Technician
Category: Toyota
Satisfied Customers: 17203
Experience:  ASE Master tech, 30 years experience
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My 2006 sienna only produces heat in the driver compartment

Customer Question

My 2006 sienna only produces heat in the driver compartment while the passenger side and rear blow cold only.
JA: Have you checked the coolant level? Has there been any leaking from the hoses?
Customer: yes all looks good
JA: Are you fixing your Sienna yourself? What have you tried so far?
Customer: My mechanic has looked at it and feels that the lines may be clogged but he is saying that i may need a heater box but i can't understand that since i do get heat.
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 4 months ago.
Category: Toyota
Expert:  Super Mechanic replied 4 months ago.

Hello and welcome. My name is ***** ***** you for visiting the site, I am reviewing your question and will reply shortly, thanks.

Expert:  Super Mechanic replied 4 months ago.

Do you have the VIN for it?

Customer: replied 4 months ago.
Expert:  Super Mechanic replied 4 months ago.

I see, thanks.

Let me just say that any money that you paid, or if you have a subscription, that money stays in your account until the answers are rated, (positive) regardless of how fast or how long it may take to get finished. You can FOLLOW UP AT ANYTIME, even after rating.


That is not a problem in the heater core.

There has been a factory service bulletin, (not a recall) for that type of concern.



Here is a link to what it states. You can copy and paste it into a new browser and rate the answer on this page.



Please don’t forget to rate the answer in a positive way, . EVEN IF YOU HAVE A SUBSCRIPTION ****THAT IS THE ONLY WAY I GET PAID ****



Customer: replied 4 months ago.
i need to look into this service bulletin myself?
Customer: replied 4 months ago.
Is this the answer i'm looking for from the bullitin? Should i tell my mechanic this?
Improved HVAC control logic has been developed to address this concern.
Expert:  Super Mechanic replied 4 months ago.

Yes, with any factory service bulletin, that has to be addressed before any accurate diagnosis can be done, thanks

Expert:  Super Mechanic replied 4 months ago.

There has been an updated part for that.

We, (the experts) are only paid by your positive ratings. thanks

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