Toyota Sienna Heating / Cooling

WWEST, Looks like I've got it fixed. I totally agree with you that the noise is from some bad friction between magnetic clutch and rotor, but I was not sure if is from a bad belt, tortured axils, some dirty stuff stocked in between, or not enough current to produce ample megnetic field so that clutch would not get close enough to the rotor. So, I started with the cheapest try, changing battery......and amazingly, it stopped......at least for today. I am glad that this is easy and hope it'll be a real problem solver. Will keep you guys posted.

#132 of 179 Re: 05 Sienna Rear Blower fan not working at all [roam4adventure] by relooky01

Jul 31, 2010 (7:43 am)

Replying to: roam4adventure (Jul 29, 2010 5:51 pm)

Look for RR A/C relay in fuse/relay box next to battery in driver's side of engine compartment. The relay next to it labeled HTR is for the front blower motor. If you switch the two the problem should move from the back to the front. The relays pull straight out but are very tight in the socket. You can take the cover off the bad relay and polish the contacts with crocus cloth if you are so inclined. A new one cost me around $20 and only the Toyota dealer had it. Last year I replaced the rear relay with a repaired one and it has worked ever since. Good luck!

#133 of 179 2005 sienna AC blower relay not working, PN90080-87025 by switchover

Nov 23, 2010 (7:37 pm)

I'm in Canada, where can I get the part? I asked dealer in canada, was told $123.09+tax, is too expensive, Is there any possibility I can buy from US dealer? don't know if they can ship to Canada. Does anybody have info pls let me know. thanks a lot.

#134 of 179 2005 Toyota Sienna Mini Van Heat at idle question by ctbas2005

Nov 29, 2010 (8:11 am)

I have 95,000 on the Sienna and have not had any major issues. Since last winter, I have a new battery and new belt. Perhaps this is an issue where the belt is incorrect?

The heat works but when at idle, the air comes out cold. The heat is back instantly as soon as the car is moving. Any ideas on why this is occuring?

Replies to this message:

#135 of 179 Re: 2005 Toyota Sienna Mini Van Heat at idle question [ctbas2005] by ateixeira

Nov 29, 2010 (9:30 am)

Replying to: ctbas2005 (Nov 29, 2010 8:11 am)

That's so strange I just had to respond.

Do you have recirc on? Or fresh air?

I would try toggling that to see if it makes a difference.

Wonder if some vaccum hoses are loose and the leak prevents certain trap doors from opening in those circumstances?

I know for the intake a vaccum tube opens a secondary port for more air at high revs.

#136 of 179 Re: 2005 Toyota Sienna Mini Van Heat at idle question [ctbas2005] by wwest

Nov 29, 2010 (11:08 am)

Replying to: ctbas2005 (Nov 29, 2010 8:11 am)

You have a "vapor lock", air bubble, in the coolant hose to the heater core. Check coolant level.

#137 of 179 Re: Cooling Temp Output Front/Rear [gedgoudasl] by caro1216

Nov 30, 2010 (9:52 am)

Replying to: gedgoudasl (Apr 17, 2009 1:57 pm)

Hello there
Did you find out what the problem was? I have the same exactly issue and the dealer still saying there is nothing worng. But it is, sometime it heats ok, sometimes is only COLD air and my children are freezen. I got tired and dont know what to do.
Thanks

#138 of 179 Re: 2010 Sienna LE - can I convert climate control to XLE digital sytle? [mhierhol] by caro1216

Nov 30, 2010 (12:53 pm)

Replying to: mhierhol (Dec 30, 2009 4:27 pm)

HELLO THERE. HAV ETHE SAME PROBLEM, HOW DID YOU FIXED IT! Thanks caroina

#139 of 179 Sienna 2008 Rear Heat Issue by caro1216

Dec 01, 2010 (6:54 am)

On my 2008 Sienna I setup the air to be hot in the front and I also setup to control the rear to be hot. While I am HOT in the front I found out there in only COLD air coming from the rear vents. My kids are freezing and there is no way they can tell me that is COLD because they are 6 months and 1 � . I took the car to the dealer at the moment it was happening and even though the guy saw that it was COLD air coming from the rear vents either way he tried , so at the end he told me to set up the AIR to come out from the floor vents , because the vents on the floor were giving HOT air , that way at least my kids won�t get COLD air from the rear VENTS , just while they found an appointment for my car, I had to come back after three days and what happened? They said everything looked fine! There was nothing wrong, that the rear vents are made to only give COLD air. What!!? And he also mentioned that the rear right vent is supposed to give warmer air. What?? I don�t think they are right. I am waiting for this to happen again but I don�t want to go thru this ONE MORE TIME! My kids don�t deserve it! I paid for a NEW CAR to be working OK and so far this looks like a LEMON car because I reported this problem when my car had 300 miles (winter) , now that has 12000 miles (WINTER AGAIN) it is happening again. What do you recommend to do?

Replies to this message:

wwest (Dec 01, 2010 10:25 am)
- caro1216 (Dec 20, 2010 7:04 am)
  - yatesjo (Dec 22, 2010 5:23 pm) and 1 more...

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