Last post on Feb 10, 2013 at 3:29 PM
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Toyota Avalon, Heating / Cooling, Sedan
#206 of 217 2007 Avalon - When in park or stopped and AC running, RPMs fluctuates
Sep 15, 2010 (11:18 am)
I own a 2007 Toyota Avalon and am having the following problem.
When the car is stopped at a traffic light or in park and the AC is on, the RPMs will fluctuate. RPM will increase by 250 - 750 above idle every few seconds and then drop.
The symptoms go away when the AC is turned off or set to MAX Cold Temp and High Fan. Fluctuations are greater when the AC fan is set to its lowest speed.
#207 of 217 Re: 2007 Avalon - When in park or stopped and AC running, RPMs fluctuates [manav82]
Sep 18, 2010 (9:47 am)
SOP, the engine "idle" RPM is changed as the A/C compressor clutch cycles, engages and disengages due to refrigerant flow demand. Lower blower speeds, in general, make the system more efficient and thus longer cycles.
#208 of 217 o6 Avalon XLS intermittent a/c
Jun 05, 2011 (2:27 pm)
I have an 06 Avalon XLS with 138,000 miles. I have started having this a/c problem where the compressor just seems to stop working. I can tell by the smell! Toyota told me it needs a new compressor at the cost of $1800.
The issue though I can press the AC button on and off within a second and the AC starts working again instantly! I do not think it is a compressor, but I can not find a blog that discusses this particular problem.
I am hoping that I will get a good answer here to tell me what to look for or what to mention when I take it to an AC mechanic. I want to kinda know what I am talking about.
Thanks to all that comment.
#209 of 217 Re: o6 Avalon XLS intermittent a/c [fsimcic]
by Mr_Shiftright HOST
Jun 05, 2011 (3:22 pm)
You may wish to consult your owner's manual for testing purposes. The system in your car is quite complex and uses various computers and sensors to control the compressor. :
SELF-DIAGNOSIS: Air Conditioning ECU has a self-diagnosis function. It stores any operation failures in the air conditioning system memory in the form of DTC (Diagnostic Trouble Code).
There are two methods for reading DTCs. One is to use a hand-held tester, and the other is to read the DTC on the heater control panel switch.
DTCs are shown on the center display or multi display of the multi-information display, and on the hand-held tester.
#210 of 217 Re: o6 Avalon XLS intermittent a/c [Mr_Shiftright]
Jul 01, 2011 (1:19 pm)
Could you please tell me how one gets the DTC on the heater control panel switch?
#211 of 217 '99 Avalon XLS A/C fuse
Sep 07, 2011 (8:10 pm)
I just bought a beautiful '99 XLS Platinum Edition today. Then on the way home the climate control quit working. (Now) I know that much has been posted here on this topic. I'm hoping that I don't have to replace all those expensive parts. The only thing that might save me is the one 10 amp A/C fuse inside the passenger side kick plate noted in the owners manual. But, I can't find it. I stood on my head inside the car trying to. Is it really there? If so, can you help me locate it?
#212 of 217 Re: '99 Avalon XLS A/C fuse [aavalone]
Sep 08, 2011 (5:01 am)
On my car, I lost the climate control, but also, the outside temperature display also went out at the same time. Mine turned out to a be a part they called an amplifier. Why it's called that,I have no idea,but it cost $800.00 from Toyota to replace it. I thought it should have been a recall because of losing the defrosters ( safety issue). But Toyota thought differently!
#213 of 217 Re: o6 Avalon XLS intermittent a/c [matherjcan]
by Mr_Shiftright HOST
Sep 08, 2011 (7:14 pm)
So you don't have an owner's manual?
#214 of 217 2008 Avalon climate control part time A/C
Sep 09, 2011 (9:07 am)
Air conditioning seems to work okay in weather up to about 85-90 degrees F but quits when it gets around 95+ especially if I park the car and start it back up. It seldom works until the air temp gets back below 90F If it does work (cycles on and off just long enough for you to begin feeling cool air come out and then goes off) it is never cycling long enough to cool the inside of the car. It is usually so hot inside we have to roll the windows down. I've taken to A/C mechanic and he couldn't find anything wrong. Compressor okay, charge okay. Works and cools great in shop. Same with dealer although they just checked the charge and said compressor is okay. On the drive home it quit working again (102 outside temp). Anybody got any ideas?
#215 of 217 Re: 2008 Avalon climate control part time A/C [hogrider47]
Jul 16, 2012 (3:38 pm)
I have an 1998 Avalon XLS which is parked outside under a hot summer sun. When I would enter the hot car and turn on the A/C, it would either run for 30 seconds or not run at all. All buttons and indicators would not work nor light up. After a considerable cool-down, everything worked fine. After some experimentation based on what I have read here and elsewhere, I decided that before I turned off engine, I would leave the "AUTO" button on, and the temperature selector at lowest temp setting. Thereafter, upon starting the hot car, the A/C worked fine for several years. About a month ago, my system failed once. I then decided to go "manual and avoid "AUTO." The following buttons are depressed: "Air Intake Selector" on recirculate, "A/C," "Air Flow Selector" is on to the face, "Fan Speed Selector" is on Hi, "Temperature Selector" is at lowest setting, and "AUTO" is not depressed. This works great, even on temps over 100. It would seem that Toyota's faulty amplifier cannot take the heat and shuts everything down and it will not reset until it is cool. I hope this info saves somebody lots of money.