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Toyota Sienna Heating / Cooling

93 messages,  Last post on Nov 16, 2009 at 4:07 PM

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#43 of 93 '05 Sienna A/C quit working completely by jzx81 May 12, 2008 (4:55 pm)
I have a 2005 Toyota Sienna with roughly 9k miles on it and the A/C died completely while taking the mom out for Mother's Day yesterday. To make matters worse, the warranty ended two weeks ago and I did not get it extended. The A/C button does not light up when pressed and the blower does not come on at any blower setting level. My mechanic friend said the blower is still getting power when activated by the switch. He suspects the resistor pack is bad that is located close to the blower motor. I had no A/C problems prior to this or any signs leading up to this failure. Anyone have any experience with this problem before or suggestions? Thank you for any input! Replies to this message: brintegra (Jun 13, 2008 4:08 pm) jzx81 (Jun 13, 2008 7:59 pm) 1979 (Jun 27, 2008 11:31 am) relooky01 (Jun 30, 2008 2:34 pm) kharding (Jul 07, 2008 10:35 am) relooky01 (Jul 07, 2008 12:47 pm) and 4 more...
#44 of 93 Re: Hot Air Coming From Air Vents While the AC's On! [wwest] by jijubar May 20, 2008 (9:38 am)
Replying to: wwest (Jan 18, 2008 5:51 pm) I too have a similar problem. The compressor clutch does not always engage when AC is turned on but when it does, everything works great. Where exactly is the cabin temp sensor and if open, can it be substituted with a resistor of appropriate value to indicate the need for cold air?
#45 of 93 Water running by 1979 May 29, 2008 (4:39 pm)
We have a 04 Senna with about 56000 miles on it. When the engine is on it sounds like water running in the air conditioning heating unit. Does anybody have any ideas? The dealer says he can hear it but will need the car at least a day and will have to contact tech support. Replies to this message: wwest (May 29, 2008 5:46 pm)
#46 of 93 Re: Water running [1979] by wwest May 29, 2008 (5:46 pm)
Replying to: 1979 (May 29, 2008 4:39 pm) There is ALWAYS water/coolant running through the heater core within the A/C plenum but you should never hear it unless the coolant level is low enough to be moving air bubbles.   Be sure your coolant level is proper.
#47 of 93 2004 rear ac by pit1 Jun 05, 2008 (2:23 pm)
We have 20004 Senna with 25,0000 miles. Last week the rear ac stopped blowing cold air. The front is working ok. I open the rear compartment where the rear blower is located and feels like there is plenty of cold air inside the blower. Its just not getting to the rear vents. Can anyone help/ thanks
#48 of 93 Re: '05 Sienna A/C quit working completely [jzx81] by brintegra Jun 13, 2008 (4:08 pm)
Replying to: jzx81 (May 12, 2008 4:55 pm) hi there!   did u get this problem sorted out - was it the resistor or fuse / i have a sienna with 10K miles with the exact problem.   would appreciate any inputs - my email is nandab25yahoo.com   thnx bobby Replies to this message: jzx81 (Jun 13, 2008 7:59 pm) 1979 (Jun 27, 2008 11:31 am)
#49 of 93 Re: '05 Sienna A/C quit working completely [brintegra] by jzx81 Jun 13, 2008 (7:59 pm)
Replying to: brintegra (Jun 13, 2008 4:08 pm) It turned out to be the A/C Heater Relay, PN 90080-87025, $16.40 from dealer. Luckily, we have a guy at the dealership (bought the Sienna from him) that hooked us up with free service even though warranty was over.
#50 of 93 Re: '05 Sienna A/C quit working completely [brintegra] by 1979 Jun 27, 2008 (11:31 am)
Replying to: brintegra (Jun 13, 2008 4:08 pm) Didn't get it fixed. Dealer wanted $1100 To replace the ac panel and wasn't sure that would fix it. We just live with it doesn't do it all the time.
#51 of 93 Re: '05 Sienna A/C quit working completely [jzx81] by relooky01 Jun 30, 2008 (2:34 pm)
Replying to: jzx81 (May 12, 2008 4:55 pm) I also have a 2005 Sienna. On several occasions the blower and AC would not come on when the blower switch is in any of the ON positions. They did eventually come on and worked properly the rest of the day. I suspect the HTR relay (Toyota PN 90080-87025) is working intermittently and have a new one on order ($18.18 from the local Toyota dealer). It is located in the fuse box under the hood next to the battery. I switched this relay with the RR A/C relay next to it and then the rear heater/AC blower would not come on but the front blower worked fine. Replies to this message: kharding (Jul 07, 2008 10:35 am) relooky01 (Jul 07, 2008 12:47 pm) muddyazian (Jul 08, 2008 5:47 pm) and 3 more...
#52 of 93 Re: '05 Sienna A/C quit working completely [relooky01] by kharding Jul 07, 2008 (10:35 am)
Replying to: relooky01 (Jun 30, 2008 2:34 pm) I am having the exact same problem with my heater/cooling fan switch. I start up the car, try to turn on the A/C or Heater, and nothing works. I then drive for about 5-10 minutes, with the setting on low and it may kick on. I try to turn the A/C to a higher setting and it goes off. Did replacing the HTR relay ultimately fix the issue? $18.18 is a little more palatable than replacing the switch, and easier also... Replies to this message: relooky01 (Jul 07, 2008 12:47 pm) muddyazian (Jul 08, 2008 5:47 pm) kharding (Jul 09, 2008 8:09 am) and 2 more...

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