Ask the Car People.SM


Toyota Sienna Heating / Cooling

179 messages,  Last post on Dec 02, 2012 at 9:08 PM

You are in the Toyota Sienna Forum.

What is this discussion about? Toyota Sienna, Heating / Cooling, Van

Messages Page 19 of 19

#175 of 179 A/C quit working all of a sudden by dricekrice

Jul 07, 2012 (12:46 pm)

I have a 04 Toyota Sienna LE AWD and had the ac stop working. It had been working fine the day before and even earlier in the day, but now it just blows hot. I doubted it was the problem but to make sure bought some refrigerant to add to the system and it almost seemed like the low pressure side was not low pressure as none of the refrigerant would go in. But maybe it was just that it didn't need any at all. What should I do to test and find/confirm the problem?

#176 of 179 2001 Toyota Sienna XLE Front A/C Auto Temperature control problem by b1tbuck3t

Jul 10, 2012 (7:07 pm)

We have a 2001 Toyota Sienna XLE which is having A/C problems. Intermittently it is not blowing cold air in the front. The rear A/C is able to consistently blow cold air. Checking the inspection port on the drier shows bubbles moving when the compressor kicks in. I would not be surprised if it could use a little refrigerant given the age of the vehicle but the system is blowing consistently cold air in the rear.
 
When the A/C seemed to stop working we have found if you raise the temperature in the front to max heat and then adjust it back down to cool it seems to get stuck on heating. Conversely if you go to max cool you can usually get it to switch to cool even when raising back to 74 degrees.
 
There is a ticking noise directly behind the center vents (where I assume the mixer box is) that will stop if you go to max heat or cold but seems to continue if you leave it at around 74 degrees.
 
Any help with additional trouble shooting steps would be appreciated.

#177 of 179 Re: 2001 Toyota Sienna XLE Front A/C Auto Temperature control problem [b1tbuck3t] by fibber2

Jul 11, 2012 (1:10 pm)

Replying to: b1tbuck3t (Jul 10, 2012 7:07 pm)
A constant ticking sounds like a failure of the air mix solenoid assembly. A solenoid is a motor with positional feedback, so the clicking is likely from stripped gears as a result of the motor trying to fight a stuck blend door.
 
Edit: Sorry - got side tracked and didn't finish the thought.... So, you'll need to work up from under the dash to locate the solenoid, and replace it. But as important, check out the mix door movement to ensure it moves easily. Binding or lack of lubrication will only kill another motor assembly.

#178 of 179 2013 sienna se heating problem by smyleguy

Nov 27, 2012 (12:14 pm)

traveling back from florida trip with 50 degree oat
we had trouble getting heat to driver's side unless set to
"max heat". seems intermittent at best.
due for first service, do I have legit complaint? thread seems to
point to repeating problem
smyleguy

#179 of 179 Re: Heater only heats when moving [doelke] by audwxe0

Dec 02, 2012 (9:08 pm)

Replying to: doelke (Mar 02, 2010 6:37 am)

Messages Page 19 of 19

To POST a message, please Sign In.

Advertisement

Browse by Category

Browse by Vehicle
   View All Vehicles

Browse by Board
Browse by Topic
View All Topics

Edmunds Community

Advertisement