Last post on Feb 10, 2013 at 2:29 PM
You are in the Toyota Avalon
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Toyota Avalon, Heating / Cooling, Sedan
#35 of 217 Toyota Avalon heater-nomad56
Dec 03, 2003 (4:52 pm)
Hi nomad56, Thanks for the followup. I found an interesting link after you mentioned the A/C amplifier in your last post. Check this link: www.e-toolbox.com/ads/index.cfm and follow the year 1998, make Toyota and model Avalon. Go to technical service bulletin and Heater A/C system improvement. you will have to download the TSB. It talks about the TSB dated Nov.5 1999 and the title Auto A/C system improvement for a 1998 Avalon. It outlines the A/C amplifier, Servo motor, and Servo-link/damper replacement. It also shows a brief repair page. Do you have more detail in your service manual to replace these parts. If so, maybe you can send them to me by fax or mail. I would really like to solve this problem if you know what I mean. Take a look and give me your opinion since all the other options have checked out Ok. thanks Dan
#36 of 217 Avy heater...
Dec 03, 2003 (8:36 pm)
danbeth-I will look at my Svc man. and let ya' know if there's anything useful. ...give me a day or so to check it out(busy sched). -nomad56-
#37 of 217 danbeth-A/C amp...
Dec 07, 2003 (6:31 pm)
db-sorry for the delay, been real busy. YES! the svc manual outlines procedures for the items in this svc "bulletin". 1) The A/C amplifier:Remove the stereo. It is, apparantly, mounted on the stereo bracket. 2) A/C blower motor removal, not quite as straight forward... I will gladly e-mail all these pages to ya'. If you can give me a day or two to scan 'em. I hope it's not a mad rush. Unfortunately, I am trying to hit a few deadlines with my work. Meanwhile, e-mail me your info. My e-mail is available to forum members. -nomad56-
#38 of 217 Avalon HVAC
Jan 04, 2004 (3:13 pm)
I have a 1998 Avalon with the same problem described in message #83. The HVAC will run OK for weeks and then all of a sudden it stops working. Sometimes I can turn the engine off for a few minutes and when I restart the engine the system will start working again. I've taken it to my local dealershipp and they say that they're not aware of a service bulletin for this. They said thier diagnosis was to relpace the computer (which I did for about $650) and it seemed to fix it for 3-4 months but now the problem is occuring again. Anyone have any advise?
#39 of 217 HVAC repeat problem.
Jan 04, 2004 (8:21 pm)
rbremer-If the new "computer" died, that's a fluke, and probably WARRANTY" work??? start there.
If the dealer does not give you a definitive diagnoses, you will have to start troubleshooting the system, to isolate the bad component.
What "computer" did the dealer replace? Toyo HVAC is a web of sensors, switches and relays. It often requires some electronic testing equipment and skills. Let us know.
#40 of 217 A/C Fan Turns on after a good Bump in the Road...
May 09, 2004 (2:52 pm)
I have a 1996 Avalon, Runs Great but I have encountered a problem with my fan. Many times the fan will not active by pushing the fan speed button or by the automatic climate control until until I drive the car over a speed bump at 10 mph or less. I know something elec / mech is loose but have no knowledge of where to look first except for the fuse box under the hood which seems to be fine. And it does not seem to matter if the a/c compressor is activated or not. there is no movement by the fan motor until I go over a good bump.
Any suggestions before bringing the car in for A/c fan work,$$$$???
All Help is Appreciated thanks in Advance
May 10, 2004 (12:04 pm)
Does the fan work when the heater is on?
#42 of 217 My A/C Fan Continued
May 10, 2004 (3:21 pm)
Yes, the fan when running will be active with a/c, heater, and defroster etc.. all combinations of the vent selector buttons. heater on or off, compressor on or off.
Thanks Mr_Shiftright HOST May 10, 2004 (4:04 pm)
Does the fan work when the heater is on?
#44 of 217 Heater...
May 10, 2004 (5:53 pm)
Michanth-NOT a guarantee, but it is most likely a bad relay. There are several in the Avy's A/C-heater system. A dealer, or good Toyo mechanic is your best bet... they are difficult to test, without proper equipment. Otherwise, the three you want to look at are behind the radio & a/c control panel. To isolate the bad one, you can "tap" each of them and see if the fan starts to run. If this reveals the bad one, go to a dealer or parts store and order a new one. If you are near a "Pick your own parts" yard, this is a great way to save a few bucks. -nomad56-