AC blowing hot air - Club Lexus Forums

Log In 

AC blowing hot air

Reply
 
 
 
Thread Tools Search this Thread
Old 03-30-13, 02:17 PM   #1
b3player
Driver School Candidate
Thread Starter
 
Join Date: Mar 2004
Location: South Carolina
Posts: 31
Default AC blowing hot air

A few months my AC starting blowing hot air. When I was at the dealer, they claimed the compressor was bad and wanted over a 1000 to replace. I looked online when I was there and said the new denso compressor was about 300 online. They wanted double. I just left and didn't worry about it since it was about winter then. Now I need to get it fixed.

A guy noticed the other day when I cut the AC button on, the clutch engaged and cut back off. He didn't have time to fully check it that day and wants me to bring back if I can another day.

I did some searching on this board, but haven't seen compressor issues with the SC430. I have a 94 ES300 and a 2004 RX330 and neither have had compressor issues. So I am shocked at this anyway.

I bought a relay, but that did not work. I just read on the LS forum that a lot of people have had problems with the AC pressure switch.

I understand that switch could prevent the compressor from coming on when the switch goes bad. Do we have that switch on the 06 SC430? If so, where is it? I can't find a part number listed in Alldata. I would love to check it before spending a ton of money on compressor replacement.

By the way, I have plenty of refrigerant. They checked that at the dealer and added some then. And I did AC diagnostics and show no codes.


Thanks in advance for any help.
b3player is offline   Reply With Quote
Old 03-14-14, 12:22 PM   #2
b3player
Driver School Candidate
Thread Starter
 
Join Date: Mar 2004
Location: South Carolina
Posts: 31
Default

I didn't receive any help from anyone. But I will post the fix for this in case someone else runs into this problem.

After replacing the compressor, pressure switch, computer, and 2 climate controls, I finally found the fix.

Thank God that I found a forum where someone was talking about a toyota with an ac compressor that disengages right after you cut the AC on. It turns out they needed an AC Amplifier.

I starting searching for this part on the SC430. It is on a unit right behind the climate control. The part numbers are the same for 2002 - 2005. Thats when I discovered why the used climate controls wouldn't fix the AC problem. When you buy used climate control, the seller or junkyard will give you the whole unit together, not just the climate control on the front.

All these climate controls work fine on any year for the SC430 and all sites will tell you that. That threw the mechanics off who were working on this issue because all the controls worked and even the convertible top and GPS controls worked.

But for the 2006, you need to find a climate control unit for a 2006! Because there is something different about the AC amplifier on the back of it.

I finally found one for this year the other day, and it took me a couple of minutes to install. And I have cold air again. Thank God I wasn't charged for labor because the mechanics couldn't solve it. I just had to pay for these parts. But I will try to sell on ebay.
b3player is offline   Reply With Quote
Old 03-14-14, 01:23 PM   #3
bacardi11
Lexus Test Driver
iTrader: (1)
 
Join Date: Apr 2013
Location: N.J.
Posts: 1,161
Default

hi
when compressor cut in and out you need to charged the unit. check system pre. first see if charge in needed.

Last edited by bacardi11; 03-14-14 at 01:29 PM.
bacardi11 is offline   Reply With Quote
Old 11-18-15, 07:57 AM   #4
Daverx330
Driver School Candidate
 
Join Date: Nov 2015
Location: nc
Posts: 4
Default

This may help my problem, thanks for posting solution
Daverx330 is offline   Reply With Quote
Old 11-18-15, 03:34 PM   #5
Bgw70
Lexus Champion
 
Bgw70's Avatar
 
Join Date: Dec 2014
Location: Fl
Posts: 2,160
Default

Quote:
Originally Posted by Daverx330 View Post
This may help my problem, thanks for posting solution
Will you help others and post your findings?
Bgw70 is offline   Reply With Quote
Old 11-18-15, 04:13 PM   #6
Bgw70
Lexus Champion
 
Bgw70's Avatar
 
Join Date: Dec 2014
Location: Fl
Posts: 2,160
Default




Go do this quick voltage check on the AC amplifier.<br/>BTW, this is a picture of the Lexus SC430 shop manual...
Bgw70 is offline   Reply With Quote
Old 11-18-15, 04:17 PM   #7
Bgw70
Lexus Champion
 
Bgw70's Avatar
 
Join Date: Dec 2014
Location: Fl
Posts: 2,160
Default




Use this check to pull codes from the AC system...I learn something new about this car everyday!<br/>These shop manuals were a GREAT investment!<br/>They are a must have item unless you take it to a mechanic for all your work.
Bgw70 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
AC Issues - Tried EVERYTHING - Please help! jarob SC430 - 2nd Gen (2001-2010) 16 06-08-16 11:38 AM
Quirks with AC on my 14 IS350 - takes a while for compressor to kick in? evident IS - 3rd Gen (2014-present) 2 07-09-15 08:09 AM
A/C compressor quitting when idling in hot weather ancdmd LS - 3rd Gen (2001-2006) 5 09-08-14 03:03 PM
So hot in PHX... Need A/C Help! SC300AZN Performance & Maintenance 2 07-19-14 12:53 AM
Which new compressor for 92 r12 or r134a WDoherty Performance & Maintenance 4 04-24-13 06:48 PM


Tags
1998, 2007, ac, air, blowing, blows, car, cold, es300, es350, hot, lexus, ls460, max

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 12:08 AM.


Copyright © 2000-2016 Internet Brands, Inc. All Rights Reserved