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AC is not cold?

Tiny
FPICKENS
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 98,000 MILES
My rear a/c does not blow cold air. Everything works but the air is not cold. How do I check for air blockage in the rear unit
Thursday, April 15th, 2010 AT 8:23 PM

31 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Hello,

It sounds like you are low on freon here is a video to show you how to change the system with a troubleshooting guide.

https://youtu.be/uZrQCGwXfek

and

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down these guides and report back.
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Saturday, April 24th, 2010 AT 4:10 PM
Tiny
FPICKENS
  • MEMBER
  • 2 POSTS
It was low I got a recharge kit works great! Love this site.
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Monday, April 26th, 2010 AT 11:52 AM
Tiny
JSCORMIER
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 18,000 MILES
I have a Chevy Astro van 1999. Typically in the hot summer in FL my high speed fan and ac stops working. This has happened previously. Each time the repair service replaces the ac blower resistor. Since this appears to be happening routinely and the fix is always the same has a design issue been identified by Chevy. Has Chevy corrected this and how and what does it involve to fix the problem. Is this a fix I can do myself if I buy the part. Thanks for your assistance.
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
You said high blower speed? Do the lower speeds work?


https://www.2carpros.com/forum/automotive_pictures/170934_chevy_astro_resistor_1.jpg



If the problem is the resistor for the front blower, I don't know why you can't replace it yourself?
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
GLENAZ
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET ASTRO
Air Conditioning problem
1999 Chevy Astro

I recently had my radiator replaced. Afterwards, the A/C continued working fine for a while (a week or two). Then it suddenly stopped working. It had been sitting for a couple of days. The compressor clutch does not appear to be engaging. What are the most likely possible problems? Could a refrigerant leak have recently occurred, even though it was okay with no problems? Maybe a plugged orifice? Or a bad clutch?
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Need to start by checking the pressures of the system to be sure it is full of refrigerant. If it is full, test for power at the clutch, if no power but full charge, test for power in and out of the low side cycling switch (located on receiver/dryer)
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
SIDRICK
  • MEMBER
  • 8 POSTS
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
My 1999 chevy astro van's air conditioning is not working.I tried recharging the system and it blows cool air for a couple hours and the compressor cuts in and out rapidly, then there is no cold air. What do you think it is thanks.
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Did you do an entire evacuate and recharge with the exact, weighed capacity of refrigerant?
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
SIDRICK
  • MEMBER
  • 8 POSTS
I put in the right amount of refrigerant but I dont have a refrigerant recovery machine. Do you think it might have moisture or debris in the lines. It could have a leak somewhere.
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Did you start from a vacuum when you recharged it?

What are the high and low pressure readings at idle and 2,000 RPM on high blower?
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
SIDRICK
  • MEMBER
  • 8 POSTS
On the ref. Gauge it would fluxuate between 25 and 45 psi. But when I initially started it read 5 psi.
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You need a vacuum pump and professional gauges. Please go over this video to see what I am talking about.

https://youtu.be/4EqdrBVb0sY?si=LYvQ5uzWfNAz7Cyb

Please go over this guide and get back to us.

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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
SLYJOHN38
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 102,000 MILES
My air conditioner gets cold but the fan is not blowing cold air inside
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
SIDRICK
  • MEMBER
  • 8 POSTS
Do you have an estimate on what that would cost? I dont want to put it in a shop and pay 400-600 dollars on a 100 dollar problem I cant really afford that.I'm a full time student. Thank you for your help.
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
WILLIAM_STELTER
  • MEMBER
  • 24 POSTS
When you switch it from hot to cold make sure the flap is moving between the heater core and the air core. It is the right side under the dash. You would have to take dash apart :(
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Thursday, September 5th, 2019 AT 3:20 PM (Merged)
Tiny
GARYSCHEVY1
  • MEMBER
  • 2 POSTS
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 149,000 MILES
On my wifes van the rear a/c works but the front a/c is hot. I know its not a blend door problem because the receiver dryer is hot and does not get cold. I have replace the receiver dryer, oriface tube, and put a used a/c comp. On it.
We have got 3 kids and little money so if you could help with any advise it would be greatly appreciated.
Thanks Gary
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Thursday, September 5th, 2019 AT 3:21 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
There has to be something blocking it. Is the compressor cycling properly?
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Thursday, September 5th, 2019 AT 3:21 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
I'm sorry, I wanted to add check the dryer to see if it is plugging.
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Thursday, September 5th, 2019 AT 3:21 PM (Merged)
Tiny
GARYSCHEVY1
  • MEMBER
  • 2 POSTS
Sorry I had not checked this in a while. I also thought there had to be something blocking it. The only thing I could think is if a line is internaly busted blocking itself off or if the evaporator itself is blocked. I have replaced the dryer twice (new ones) each time.
Any thoughts?
Thanks Gary
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Thursday, September 5th, 2019 AT 3:21 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
If the compressor is cycling, then I would say the evaporator could be plugged. If it isn't turning on, then there may not be freon in it. Thus, something has broken or leaked. I really think you are on the right track with this one.
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Thursday, September 5th, 2019 AT 3:21 PM (Merged)

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