Go Back   Club Lexus Forums > Lexus Model Forums > GS Models > GS - Second Generation
Sign in using an external account
Register Forgot Password?

A/C Blowing Hot Air

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 03-18-10, 05:16 AM   #31
Matt2828
Driver School Candidate
Trader Score: (0)
 
Matt2828's Avatar
 
Join Date: Oct 2009
Location: New Zealand
Posts: 21
Default

I think an easy way to check the servo function would be to see if temperature of the air blown changes at all when the temperature is changed.

The temperature at hot should be very very hot when the temp is turned to max, even if the A/C is broken, where it should come down to a comfortable (well comfortable for your hand) level when the temperature is turned to the coldest setting.

No change = servo, change, but not to freezing indicates the A/C system (cooling side).

Also remember that the heat for the heater comes from the engine coolant, and there are valves that open and close to redirect the hot coolant to and from the heater core when needed.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
Matt2828 is offline   Reply With Quote
Old 03-18-10, 10:32 AM   #32
sakataj
Lexus Fanatic
Trader Score: (171)
 
sakataj's Avatar
 
Join Date: Jun 2008
Location: tenn
Posts: 15,413
Sakataj
Send a message via Yahoo to sakataj
Default

Quote:
Originally Posted by GS300NEGRO View Post
Yes everytime I switch the settings to the windshield/under the dash or normal settings the servos work fine.

Yes it blows air. When I am setting the temperature it starts blowing regular temp with air and when I set to the heater it works to the heater.

Any other suggestions.

Thanks
ok so then the heat side works on BOTH sides (my heat when my servos were bad only worked on one side)

run through all modes while sitting in the passenger seat and see if all modes function correctly and then do this also for the a/c see if it on passenger side it works. this will help narrow down a servo and a actual a/c problem.

have you actually had your a/c serviced or checked?
__________________


FOR ALL YOU LOWBALLERS THIS IS HOW I FEEL:
http://www.modified.com/editors/modp...ors/index.html
sakataj is offline   Reply With Quote
Old 03-18-10, 08:29 PM   #33
GS300NEGRO
Driver School Candidate
Trader Score: (0)
 
Join Date: Dec 2007
Location: Tampa FL
Posts: 15
Default

Quote:
Originally Posted by sakataj View Post
ok so then the heat side works on BOTH sides (my heat when my servos were bad only worked on one side)

run through all modes while sitting in the passenger seat and see if all modes function correctly and then do this also for the a/c see if it on passenger side it works. this will help narrow down a servo and a actual a/c problem.

have you actually had your a/c serviced or checked?
I checked all the modes and they work , when I switch to warm it warms up but when I switch to A/C cold it blows air but not A/C cold temparature.

I have the A/C evacuate and add freeon and that is when I was getting the low pressure to 60 LBS.

Thanks
GS300NEGRO is offline   Reply With Quote
Old 03-19-10, 10:16 AM   #34
sakataj
Lexus Fanatic
Trader Score: (171)
 
sakataj's Avatar
 
Join Date: Jun 2008
Location: tenn
Posts: 15,413
Sakataj
Send a message via Yahoo to sakataj
Default

Quote:
Originally Posted by GS300NEGRO View Post
I checked all the modes and they work , when I switch to warm it warms up but when I switch to A/C cold it blows air but not A/C cold temparature.

I have the A/C evacuate and add freeon and that is when I was getting the low pressure to 60 LBS.

Thanks
so your lowside pressure is 60? whats the highside?
__________________


FOR ALL YOU LOWBALLERS THIS IS HOW I FEEL:
http://www.modified.com/editors/modp...ors/index.html
sakataj is offline   Reply With Quote
Old 03-19-10, 01:15 PM   #35
GS300NEGRO
Driver School Candidate
Trader Score: (0)
 
Join Date: Dec 2007
Location: Tampa FL
Posts: 15
Default

Quote:
Originally Posted by sakataj View Post
so your lowside pressure is 60? whats the highside?
Highside is 153psi
GS300NEGRO is offline   Reply With Quote
Old 03-19-10, 03:17 PM   #36
sakataj
Lexus Fanatic
Trader Score: (171)
 
sakataj's Avatar
 
Join Date: Jun 2008
Location: tenn
Posts: 15,413
Sakataj
Send a message via Yahoo to sakataj
Default

Quote:
Originally Posted by GS300NEGRO View Post
Highside is 153psi
your lowside is to high. im afraid you maybe overcharged sir,did you check your pressures at a 45 mph idle.
__________________


FOR ALL YOU LOWBALLERS THIS IS HOW I FEEL:
http://www.modified.com/editors/modp...ors/index.html
sakataj is offline   Reply With Quote
Old 07-06-10, 07:26 PM   #37
wbmx1981
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2009
Location: South Austin, Texas
Posts: 461
Default

My A/C started doing this today. I was driving then all of a sudden the car kinda skipped (gradually accelerating) and the a/c light began to flash.
wbmx1981 is offline   Reply With Quote
Old 07-07-10, 07:18 AM   #38
poohunny
Rookie
Trader Score: (0)
 
Join Date: Mar 2008
Location: PA
Posts: 53
Default

wbmx1981, mine did the EXACT same thing a few days ago. I popped the hood and heard a hissing sound with the car off coming from the compressor area. My mechanic said that the compressor should be able to spin freely even when the car is off, but mine was seized and very difficult to turn. Since he put the dye in and could not detect where the leak was, he said it's probably a seal inside the compressor. So I ordered a remanned one off of ebay for 305 shipped and am waiting...

Onto the servos, so these things are made to "know the difference" between hot and cold air and the redirection of it? So if I am getting air evenly from all of my vents, it's safe to assume my leak is probably just the a/c compressor with clutch?
poohunny is offline   Reply With Quote
Old 07-07-10, 11:41 AM   #39
wbmx1981
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2009
Location: South Austin, Texas
Posts: 461
Default

Okay thanks. I told my mechanic he thinks it just needs freon, he is on his way now to have a look. I will update when it is fixed incase someone else is having the same problem.

Last edited by wbmx1981; 07-07-10 at 12:24 PM..
wbmx1981 is offline   Reply With Quote
Old 07-07-10, 12:24 PM   #40
wbmx1981
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2009
Location: South Austin, Texas
Posts: 461
Default

**Update** my mechanic came out and I found out that my a/c compressor is shot. He says when I replace the a/c compressor to also repalce the dryer and the expansion valve. Damn this sucks! Now I need to hunt for these parts. Does anyone recommend any online stores to buy these items? Is there a kit available?
wbmx1981 is offline   Reply With Quote
Old 07-07-10, 12:24 PM   #41
sakataj
Lexus Fanatic
Trader Score: (171)
 
sakataj's Avatar
 
Join Date: Jun 2008
Location: tenn
Posts: 15,413
Sakataj
Send a message via Yahoo to sakataj
Default

Quote:
Originally Posted by wbmx1981 View Post
Okay thanks. I told my mechanic he thinks it just needs freon, he is on his way now to have a look. I will update when it is fixed incase someone else is having the same problem.
99% of mechanics will diagnose it as needing freon....ESPECIALLY without ever seeing it or working on it. the truth is in the pressures....

and no im not saying it doesn't need freon im just saying most mechanics will always say this cause adding freon is a big money maker to them...they buy a jug of R-134 for like 170 or so and charge a outrageous amount per pound to add it
__________________


FOR ALL YOU LOWBALLERS THIS IS HOW I FEEL:
http://www.modified.com/editors/modp...ors/index.html
sakataj is offline   Reply With Quote
Old 07-07-10, 04:38 PM   #42
poohunny
Rookie
Trader Score: (0)
 
Join Date: Mar 2008
Location: PA
Posts: 53
Default

are the drier and expansion valve absolutely necessary? I only ordered the A/C compressor and clutch for 305 shipped from ebay (reman)...wbmx1981, pm me if you want more details. =)

I know ideally everything should be replaced, but what is absolutely necessary when replacing an AC compressor, clutch, and freon? If all else is well, will replacing only the compressor/clutch do any harm by themselves?
poohunny is offline   Reply With Quote
Old 07-08-10, 10:31 AM   #43
sakataj
Lexus Fanatic
Trader Score: (171)
 
sakataj's Avatar
 
Join Date: Jun 2008
Location: tenn
Posts: 15,413
Sakataj
Send a message via Yahoo to sakataj
Default

Quote:
Originally Posted by poohunny View Post
are the drier and expansion valve absolutely necessary? I only ordered the A/C compressor and clutch for 305 shipped from ebay (reman)...wbmx1981, pm me if you want more details. =)

I know ideally everything should be replaced, but what is absolutely necessary when replacing an AC compressor, clutch, and freon? If all else is well, will replacing only the compressor/clutch do any harm by themselves?
IMHO yes....but what do i know? i have only worked for a national HVAC supply house for ALMOST the last decade. i mean if you put this compressor in and the drier/expansion valve is clogged guess what....your gonna be doing this ALL over again. i also dont use used equipment..... would you want me to come to your house and put a used compressor in your house ac unit? doubtful, im not saying it wont work if you dont change it but im saying its not worth the trouble to me to find out that it wont work cause the drier is clogged or we
__________________


FOR ALL YOU LOWBALLERS THIS IS HOW I FEEL:
http://www.modified.com/editors/modp...ors/index.html
sakataj is offline   Reply With Quote
Old 07-08-10, 11:59 AM   #44
wbmx1981
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2009
Location: South Austin, Texas
Posts: 461
Default

I was told when I replace the ac compressor to also replace the receiver/dryer and the expansion valve. Is this true or ploy for more money? Also the manual says to cover the lines so no dirt or moisture gets in, what is the best methond to cover the lines a rag, tape is there a special method to this?

Also I saw that Autozone has a Denso a/c compressor for $465 with the core is this a good buy those of you that have had to buy a new compressor. I shopped Autozone because I live near one.
wbmx1981 is offline   Reply With Quote
Old 07-08-10, 12:44 PM   #45
sakataj
Lexus Fanatic
Trader Score: (171)
 
sakataj's Avatar
 
Join Date: Jun 2008
Location: tenn
Posts: 15,413
Sakataj
Send a message via Yahoo to sakataj
Default

Quote:
Originally Posted by wbmx1981 View Post
I was told when I replace the ac compressor to also replace the receiver/dryer and the expansion valve. Is this true or ploy for more money? Also the manual says to cover the lines so no dirt or moisture gets in, what is the best methond to cover the lines a rag, tape is there a special method to this?
see the answer RIGHT above your first post to get my response on the drier/expansion valve
__________________


FOR ALL YOU LOWBALLERS THIS IS HOW I FEEL:
http://www.modified.com/editors/modp...ors/index.html
sakataj is offline   Reply With Quote
Old 07-08-10, 12:44 PM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
a/c expansion valve? Alwaysgolf IS F 6 08-19-14 09:12 PM
Nothing but hot air... groverwood Performance & Maintenance 6 07-08-13 07:21 AM
A/C blows hot air...awesome. Maik04 Performance & Maintenance 8 06-25-12 07:12 PM
2000 LX470 rear A/C blows HOT mmolinar LX470 and LX450 1 06-29-09 01:26 PM
Heater problem SilverLS400 LS400 22 04-22-02 09:56 AM


Tags
300, ac, air, blowing, gs, gs400, heat, hot, lexus, low, overpressure, problem, recharge, rx, side

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 01:33 AM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info