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#1 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
'99 w/ no a/c working.....questions
Where I used to live I really didn't need an a/c........so I haven't used it in about 3 yrs and it doesn't work now that I need it here in the Ozarks this summer.
From past experience the w/ GM a/c in my old Buick, I know the compressor seals can dry out when it's not used frequently. I'm hoping that is all that's wrong with mine now, since I lost my job and money is scarce!! Since my compressor doesn't even try to spin right, would it be a problem if I put in one of those replacement freon cans that I bought from a parts store even though the compressor is not turning?? Or, does the compressor have to be running before the system will accept some freon?? I'd like to try to put in some freon with the engine stopped, then start up and turn on the a/c to see if there's enough in it to activate the compressor. I think my system holds less than 2lbs., for a '99 2dr Blazer. Any advice will be greatly appreciated!! Thanks, |
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#2 |
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where's my chippy?
Age: 20
Join Date: Jun 2007
Posts: 7,846
Location: staatsburg, ny User is: OffLine |
Re: '99 w/ no a/c working.....questions
is your ac clutch engauging?
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#3 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
Re: '99 w/ no a/c working.....questions
No.....nothing happens.
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#4 |
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Certified Auto HVAC Tech
Age: 20
Join Date: Jun 2007
Posts: 7,473
Location: Camden, AR User is: Online |
Re: '99 w/ no a/c working.....questions
the compressor doesn't have to be running to accept refrigerent...def try and put some in first before you do anything else...it simply may be out or low...the low pressure switch will kill everything if theres not enough refrigerent in it
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#5 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
Re: '99 w/ no a/c working.....questions
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#6 |
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where's my chippy?
Age: 20
Join Date: Jun 2007
Posts: 7,846
Location: staatsburg, ny User is: OffLine |
Re: '99 w/ no a/c working.....questions
it says on the can, i believe that you have to put them upside down when adding the r134a
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#7 |
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Certified Auto HVAC Tech
Age: 20
Join Date: Jun 2007
Posts: 7,473
Location: Camden, AR User is: Online |
Re: '99 w/ no a/c working.....questions
yep...lee-mill is right...upside down and you dont have to shake it....you can buy yourself a longer hose for cheap...you also may want to have a small bucket of warm water ready..sometimes you have to lay the can in it to get the refrigerent moving...it tends to get stuck because its so cold...so warm water will help out alot
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#8 |
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94 2.2, feel the power?
Age: 19
Join Date: Oct 2007
Posts: 2,973
Location: Houston, TX User is: OffLine |
Re: '99 w/ no a/c working.....questions
Alright, it's best to have your engine running and a/c on, that way when you get enough refrigerant in the system, it will engage the clutch and then adding it will be easier and faster. Most can's come with a gauge to check the level, so that can come in handy. A quick way to check the system is use a jumper on the low side pressure switch, that will bypass it and if the clutch engages, then you know that you are probably low on refrigerant. And yes, you want to hold the can upside down and slowly tilt it from side to side for the best results.
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#9 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
Re: '99 w/ no a/c working.....questions
Is it better doing the refill when the weather is hot, rather than a cool day like it is here today? Maybe I'll wait 'till tomorrow when it's supposed to alot warmer. |
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#10 |
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Certified Auto HVAC Tech
Age: 20
Join Date: Jun 2007
Posts: 7,473
Location: Camden, AR User is: Online |
Re: '99 w/ no a/c working.....questions
yes...its better to do it with the day warm...this allows the system to get up to operating pressures...which also allows the refrigerent to move around a little more freely
I've been an AC tech for about two years now...you dont HAVE to have the compressor running to get all of it in there...sometimes its better not to have it on because within the refrigerent is a lubricant for the compressor...but do turn it on when you start getting close to having it full...be sure to check and see how much you have in it as often as possilbe with and w/out the compressor running |
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#11 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
Re: '99 w/ no a/c working.....questions
The gauge on the can I bought shows right at the "full" mark blue area, when I'm NOT pulling the trigger, but drops down to the half mark of the green "low freon" range when I AM pulling the trigger to release the freon. Which reading should I be most concerned about??? I'm assuming the green low freon reading is the one I should really watch to be sure I don't overfill the system while I'm releasing the freon! Sound right?? I hope this makes some sense! |
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#12 |
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where's my chippy?
Age: 20
Join Date: Jun 2007
Posts: 7,846
Location: staatsburg, ny User is: OffLine |
Re: '99 w/ no a/c working.....questions
yea those cans are a pain in the ass someimtes to fill, just kept adding it till their empty
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#13 |
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takes 2 balls in our game
Age: 37
Join Date: Nov 2005
Posts: 4,416
Location: florida User is: OffLine |
Re: '99 w/ no a/c working.....questions
DONT over fill it, those hoses can and might blow up in your face!If you put one of those cans in there and ther compressor is cycling(coming on and off) add another can. I just got done doing mine on a 02 blazer, look..
right at MAX full ![]() the air temp coming out of the vents. ![]() |
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#14 |
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takes 2 balls in our game
Age: 37
Join Date: Nov 2005
Posts: 4,416
Location: florida User is: OffLine |
Re: '99 w/ no a/c working.....questions
You dont want to over charge it is the thing. Then it will be like having no ac again.
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#15 |
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where's my chippy?
Age: 20
Join Date: Jun 2007
Posts: 7,846
Location: staatsburg, ny User is: OffLine |
Re: '99 w/ no a/c working.....questions
im 100% sure one can will not overfill it. i think the cans at autozone are like 10,or 14oz and your system needs almost double that. since ac hasnt been used in a couple years he will be fine with one can
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#16 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
Re: '99 w/ no a/c working.....questions
Is this picture reading done while you are releasing the freon?? Or, with no freon going into the system but just with the hoses hooked up?
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#17 |
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takes 2 balls in our game
Age: 37
Join Date: Nov 2005
Posts: 4,416
Location: florida User is: OffLine |
Re: '99 w/ no a/c working.....questions
Its done my friend.Just the line hooked up showing charged. I added 3 cans ,I had to redo the entire ac in my blazer
lee I know one can wont over fill, but just making sure he dont add to much.. ![]() Last edited by s10-den : 05-28-2009 at 06:18 PM. |
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#18 |
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where's my chippy?
Age: 20
Join Date: Jun 2007
Posts: 7,846
Location: staatsburg, ny User is: OffLine |
Re: '99 w/ no a/c working.....questions
ahhhh ok good call haha
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#19 |
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takes 2 balls in our game
Age: 37
Join Date: Nov 2005
Posts: 4,416
Location: florida User is: OffLine |
Re: '99 w/ no a/c working.....questions
Hey Fixvet, I dont know how many ounces are in the big can you use, but her is what I used...Is the can you are using silver and tall?
![]() Last edited by s10-den : 05-28-2009 at 06:28 PM. |
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#20 |
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takes 2 balls in our game
Age: 37
Join Date: Nov 2005
Posts: 4,416
Location: florida User is: OffLine |
Re: '99 w/ no a/c working.....questions
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#21 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
Re: '99 w/ no a/c working.....questions
Right now, when I'm hooked onto the port without pulling the trigger...... the gauge reads about like your picture, but the compressor only cycles very quickly and doesn't stay on for very long at all, like 1-2 sec. only. I'm assuming I'm still low, right?? The air blowing out is not cool or cold at all yet. But, when I'm pulling the trigger and releasing freon, the gauge drops back into the green "low freon" part of the gauge. I assume I'm not full yet, because the compressor cycles so fast! I'll try to put some more in after supper! It's pretty cool here today, so maybe that is slowing down the process. Last edited by Fixvet : 05-28-2009 at 07:07 PM. |
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#22 |
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94 2.2, feel the power?
Age: 19
Join Date: Oct 2007
Posts: 2,973
Location: Houston, TX User is: OffLine |
Re: '99 w/ no a/c working.....questions
You check the level when you aren't adding freon, so when you aren't pulling the trigger.
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#23 |
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I AM CANADIAN
Age: 24
Join Date: Feb 2006
Posts: 5,337
Location: Ont. Canada User is: OffLine |
Re: '99 w/ no a/c working.....questions
any updates fixvet??
This was a good thread to get some info. I thought you had to bring it to a shop to re-fill, but I guess not. Gotta go buy a kit for my truck, it's warm when the A/C is on. |
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#24 |
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Fixvet
Age: 65
Join Date: Aug 2006
Posts: 19
Location: Springfield, MO......formerly San Diego User is: OffLine |
Re: '99 w/ no a/c working.....questions
Good luck! |
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#25 |
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Registered User
Join Date: May 2006
Posts: 356
Location: Austin User is: OffLine |
Re: '99 w/ no a/c working.....questions
Wow, your lines are feezing at 20 degrees! I can't get mine below 60 unless I'm going down the highway. Everything is new too.
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#26 |
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I AM CANADIAN
Age: 24
Join Date: Feb 2006
Posts: 5,337
Location: Ont. Canada User is: OffLine |
Re: '99 w/ no a/c working.....questions
woohoo got mine working again, it was low like 10psi, charged it to 40psi, the vent temp is 40 deg which is what the factory spec calls for.
s10-den how did you get down to 20 deg?? |
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#27 |
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Need LSx swap.....
Age: 31
Join Date: Feb 2002
Posts: 2,060
Location: SW Chicago burbs User is: OffLine |
Re: '99 w/ no a/c working.....questions
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#28 |
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takes 2 balls in our game
Age: 37
Join Date: Nov 2005
Posts: 4,416
Location: florida User is: OffLine |
Re: '99 w/ no a/c working.....questions
Imported snow down here to Florida...frost blowing out of the vents!
Seriously, I had to take apart the whole system in mine.CLEANED all the trash out of the lines and the condensor,had to get new comp.,evaporator,dryer and believe it or not , a high performance orifice tube.(they work) Basically just: a good clean system, GOOD vacume,right amount of oil, and a full charge which you can see right over 40#'s is fully charged.Driving down the road, its has got to 14* and actually shut the compressor off till the temp went to back up 16*, weird, I never had that happen before. but those do it yourself kits work at the parts house, dont let anyone say they dont... |
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#29 |
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I AM CANADIAN
Age: 24
Join Date: Feb 2006
Posts: 5,337
Location: Ont. Canada User is: OffLine |
Re: '99 w/ no a/c working.....questions
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