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Old 06-04-2016, 11:20 AM   #1
prodrumernate
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Default ac issue

i live in Phoenix and its already getting to be 110F and higher this week...my a/c works fine when its cooler or driving..but i deal with stop and go traffic on I10 during morning and afternoon and i sweat in the afternoon with ac on full blast...it seems to be an airflow issue..fans turn on when max ac and blower..

the radiator and condensor fins are clear other than some pebbles here and there(i can see my light shine throw it even in the bright sun) im suspecting the issue is my fans are low output..anyone know whats the largest and highest output fans that can go in my 2000 LS2?i need relief..i work outside all day in the sun..i would like to pull from a car at a junkyard as money is tight rite now so if there are compatible models with higher output plz refer to that first.thanks everyone
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Old 06-04-2016, 12:55 PM   #2
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Default Re: ac issue

If I'm not mistaken, 3.0L V6 engines have two cooling fans with three speeds. A/c demands cooling fans. Low speed with both fans wired in series, medium speed with each fan running in parallel using a resistor for each fan and high speed without resistors. All fan wiring handled by the fan control module next to the battery as controlled by the ecm. In high heat, local stop and go traffic conditions, you should be able to see and hear all three fan speeds starting with both fans running in low speed as soon as you turn on a/c. In traffic, fans should switch to medium speed as engine temps go up and then switch to high speed while stopped or parked for several minutes (hot and humid).

Listen or check to be sure both fans are running when a/c is used. There's always a possibility of resistor failure (medium speed) in one or both fans, worn out fan(s), and faulty fan control module.

One member in Texas posted about his Vue not cooling in traffic but fine at speed. Vues use two cooling fans too but switch them differently. The low speed fan burned out prematurely from almost year round use of a/c. Once replaced, a/c cooling returned in stop and go traffic.
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Old 06-04-2016, 02:58 PM   #3
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Default Re: ac issue

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Originally Posted by fdryer View Post
If I'm not mistaken, 3.0L V6 engines have two cooling fans with three speeds. A/c demands cooling fans. Low speed with both fans wired in series, medium speed with each fan running in parallel using a resistor for each fan and high speed without resistors. All fan wiring handled by the fan control module next to the battery as controlled by the ecm. In high heat, local stop and go traffic conditions, you should be able to see and hear all three fan speeds starting with both fans running in low speed as soon as you turn on a/c. In traffic, fans should switch to medium speed as engine temps go up and then switch to high speed while stopped or parked for several minutes (hot and humid).

Listen or check to be sure both fans are running when a/c is used. There's always a possibility of resistor failure (medium speed) in one or both fans, worn out fan(s), and faulty fan control module.

One member in Texas posted about his Vue not cooling in traffic but fine at speed. Vues use two cooling fans too but switch them differently. The low speed fan burned out prematurely from almost year round use of a/c. Once replaced, a/c cooling returned in stop and go traffic.
i had read about that and thought maybe it was because it wasnt engaging..i have my subwoofers on and cant hear anything but music..i think this time ill drive around with no music and listen to the fans as suggested.had a friend who said his fans worked but never adjusted their speed..i think it is an airflow problem for sure..i could replace the fans with used ones with lower miles from a junkyard to get an idea as i have use for the fans no matter what..i need to check everything for the fans themselves.i know they both turn on as i have watched them turn on while checking if the compressor engaged..is there a way top test these resistors with a multi meter to find out if they are bad?i dont know what the resistance is on them.or possibly a way to jump them to see if they change speeds without driving it?and thank you for the reply..that is something i really need to check out.
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Old 06-04-2016, 03:24 PM   #4
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Default Re: ac issue

or possibly a way to bypass the control and just run on high..its phoenix.its hot..so i see nothing wrong with running them on high.
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Old 06-04-2016, 04:36 PM   #5
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Default Re: ac issue

update.tested the car parked and let the engine heat up.a couple mins or running and funs jumped up into higher speeds..i decided to try and check if a change in rpm would change anything..indeed it did..running my car at higher rpms while parked caused cold air to blast out..let go of the gas and drop to idle..air was warm..now im going to assume its the compressor
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Old 06-04-2016, 05:10 PM   #6
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Default Re: ac issue

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Originally Posted by prodrumernate View Post
update.tested the car parked and let the engine heat up.a couple mins or running and funs jumped up into higher speeds..i decided to try and check if a change in rpm would change anything..indeed it did..running my car at higher rpms while parked caused cold air to blast out..let go of the gas and drop to idle..air was warm..now im going to assume its the compressor


K.I.S.S.

Unless I missed reading it I did not see anywhere that the proper R-134 charge has been verified.
Without the proper charge you can needlessly throw a lot of money in parts at the car without fixing anything. Replace a compressor and charge the system, it works and you say that it was the compressor when it may have just been a low charge.
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Old 06-04-2016, 06:34 PM   #7
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Default Re: ac issue

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Originally Posted by ssicarman View Post
K.I.S.S.

Unless I missed reading it I did not see anywhere that the proper R-134 charge has been verified.
Without the proper charge you can needlessly throw a lot of money in parts at the car without fixing anything. Replace a compressor and charge the system, it works and you say that it was the compressor when it may have just been a low charge.
in short, get high and low tested to verify rite amount of refrigerant is in system?
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Old 06-04-2016, 07:57 PM   #8
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Default Re: ac issue

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Originally Posted by prodrumernate View Post
in short, get high and low tested to verify rite amount of refrigerant is in system?
Not only that, but any A/C shop will be checking for leaks. If a leak is present and the mechanic does not find a fault directly related to the compressor, then the leak must be addressed first no matter what component it emanates from. In this scenario, perhaps that takes care of everything and you're on your way. Of course, it could later be determined that there is more involved, but the principle remains the same as ssicarman pointed out - K.I.S.S. This goes for me as much as for anyone else.

My only A/C work resulted from a line at the compressor coming loose. It required a new seal, being properly re-attached, tightened down and having the system recharged. That was about seven or eight years ago and, happily, the system has been running perfectly since then.
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Last edited by pierrot; 06-04-2016 at 08:09 PM.
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Old 06-04-2016, 08:58 PM   #9
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Default Re: ac issue

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Originally Posted by pierrot View Post
Not only that, but any A/C shop will be checking for leaks. If a leak is present and the mechanic does not find a fault directly related to the compressor, then the leak must be addressed first no matter what component it emanates from. In this scenario, perhaps that takes care of everything and you're on your way. Of course, it could later be determined that there is more involved, but the principle remains the same as ssicarman pointed out - K.I.S.S. This goes for me as much as for anyone else.

My only A/C work resulted from a line at the compressor coming loose. It required a new seal, being properly re-attached, tightened down and having the system recharged. That was about seven or eight years ago and, happily, the system has been running perfectly since then.
i honestly wouldnt be surprised there was a leak or something simple considering the previous owner had the compressor replaced about a year before i got the car and i dont recall the ac being like this last year.(i also replaced the timing belt a couple months ago having to drop the engine and tranny a little to do so.plus radiator and condenser seem loose.) i know getting a few things fixed and this car will last a while.worst thing i have is the dreaded P1811 code.im gentle on the car but checking into a shop to have it fixed.

i will do as you say.take it to a shop and have them check..any suggestions on what shops/prices to look for and how much?i know youre not in my area but might know what to look for when doing so.i really appreciate the help.thank you
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Old 06-05-2016, 01:11 AM   #10
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Default Re: ac issue

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Originally Posted by prodrumernate View Post
i will do as you say.take it to a shop and have them check..any suggestions on what shops/prices to look for and how much?i know youre not in my area but might know what to look for when doing so.i really appreciate the help.thank you
Prices vary greatly per region. Around SoCal hourly labor rates can range from a low of ~ $75.00/hour to over $100.00/hour depending on the shop one goes to. Many shops will have preset prices for evacuating and recharging an A/C system and will typically post them where they can be easily seen. The general "rule of thumb" about almost any business applies here. Look for a shop doing A/C work, whether a specialist or not, and find one that's busy. It's a good indicator that they've developed a good following because their repairs are done well and they're responsive to their customers if problems arise following a repair. The other "tried and true" method is word of mouth. If you have any acquaintances whom you trust that can give you a good report about a shop they use to repair their cars then you're likely to have a good experience at that repair facility.

Just in case you cannot find anyone to tell you about a shop they've used for A/C repair, but you've been told of a shop that has a good reputation, contact that shop and ask someone there to recommend a business doing A/C work. A good mechanic doesn't want to recommend another mechanical repair business which they do not trust.
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Old 06-05-2016, 08:52 AM   #11
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Default Re: ac issue

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Originally Posted by pierrot View Post
Prices vary greatly per region. Around SoCal hourly labor rates can range from a low of ~ $75.00/hour to over $100.00/hour depending on the shop one goes to. Many shops will have preset prices for evacuating and recharging an A/C system and will typically post them where they can be easily seen. The general "rule of thumb" about almost any business applies here. Look for a shop doing A/C work, whether a specialist or not, and find one that's busy. It's a good indicator that they've developed a good following because their repairs are done well and they're responsive to their customers if problems arise following a repair. The other "tried and true" method is word of mouth. If you have any acquaintances whom you trust that can give you a good report about a shop they use to repair their cars then you're likely to have a good experience at that repair facility.

Just in case you cannot find anyone to tell you about a shop they've used for A/C repair, but you've been told of a shop that has a good reputation, contact that shop and ask someone there to recommend a business doing A/C work. A good mechanic doesn't want to recommend another mechanical repair business which they do not trust.
i like that.definitely want ac during the summer so its worth the fix.i know i can get double out of the car what i have now.i dont know too many people around here but definitely know how to look online for ratings of places and live rite across from a few shops..thank you..i will definitely do as you say or even ask a few friends if they have the gauges to test the pressure
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Old 06-05-2016, 02:42 PM   #12
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Default Re: ac issue

as an update.i had the system checked out.it has low pressure..so a flush, and leak check is to be performed and filled with freon again...glad i didnt go replacing parts.
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