Last post on Jul 25, 2013 at 4:08 AM
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Toyota Sienna, Heating / Cooling, Van
#160 of 182 Re: Automatic A/C system 2006 Sienna xle. [tuctem]
Aug 28, 2011 (11:15 pm)
Problem fixed. Replaced Servo assembly , part number 87106-08060,
at the dealership . No luck with first DLR, but 2nd one showed more interest in helping me.
I mentioned the rear A/C panel being locked in auto mode, but this is OK, and do not know how it is no longer in that state.
Sep 13, 2011 (3:41 pm)
My 2007 Sienna's A/C does not work. The compressor clutch engages but does not seem to pump. I had a tech put it on A/C gauges, and it read no movement on the pressure. He said there might be a flow switch somewhere. Any ideas?
#162 of 182 Re: 07 sienna [bigdad5]
Sep 16, 2011 (2:39 pm)
Open the hood, turn engine ON, turn A/C ON. Watch your fingers...
Cooling fans behind radiator should be running...(if not, no cooling)
There are two A/Clines on the passenger side of the engine compartment - the larger diameter one shoud be HOT to the touch, and the smaller diameter one should be Cold. This should happen within the first minute or so of A/C operation. If this is not happening, get a tech who is interested in helping you, and by the way - some A/C gauges are such that they fail to push the Schrader valve center pin , and no "action" is registered by the gauges. Adapters may be needed. Not sure if this the case in your Car, but it is in my other vehicle. The A/C comp clutch is "picking" that indicates to me that the system has refrigerant but may be in need of some, but get another HI/LO gauges reading before adding.
#163 of 182 Re: 07 sienna [tuctem]
Sep 24, 2011 (11:11 pm)
entry #162, 2nd sentence - should read:Cooling fans behind radiator should be running...(if not, this results in no A/C cooling) ...
#164 of 182 Engine fan making weird sound and running quicker than normal
Oct 26, 2011 (3:24 am)
The engine fans are running faster than they normally do an they only do this when the engine reaches a higher rpm. It also makes a vibrating noise when they run faster.
#165 of 182 04 Sienna heating issue
Nov 10, 2011 (9:16 am)
Anyone know about this.....
I have an 04 sienna that when the HEAT is turned on it blows cold air(AC?) on the right side vents , and hot on the left side.
Bizarre, just started this out of nowhere?
#166 of 182 Re: 04 Sienna heating issue [boltgeek]
Nov 10, 2011 (11:11 am)
There is an air mix box in the center of the dash behind the middle vents that contains both the heater core and the AC evaporator. CE & LE models have one temperature air mix solenoid & flap, while the XLE has two (separate left and right controllers & a more upscale split mixer box. The hardware and controls are different, so which van are we talking about?
#167 of 182 Re: 04 Sienna heating & AC issue
Nov 18, 2011 (10:56 am)
in My car AC or Heat turns on only when car is running on 40 miles or more speed.
As soon as car stops at traffic light or it is in park position heat or Ac does not work. while in park position cooling fan runs rapidly and makes noise.
I added coolant in radiator. Heat indicator in Auto meter panel after car runs few miles remains on slightly higher then middle position.
#168 of 182 2009 Sienna rear heating problem
Dec 23, 2011 (11:19 am)
I have a 2009 Sienna and we noticed last night that the middle and rear vents were blowing cold air while the front vents were blowing hot air. We let it run for 15-20 minutes, tried turning it on and off and everything else we could think of. Does anyone know what is wrong.
#169 of 182 Re: 2009 Sienna rear heating problem [mhw1]
Dec 23, 2011 (2:12 pm)
Have a diagnostic run on the rear heat/ac. Something (a sensor) might be telling the system that it is hot in the rear so it is not letting the hot air circulate. The diagnostic read out will tell you what the system thinks the temperature is in the rear, this governs the systems response.