Help with Air Conditioning
Thread Starter
Instructor
Joined: May 2004
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From: Dublin Ca
Help with Air Conditioning
I just bought a used 99 C5 and the air conditioning does not seem to push any air when you turn it on at any level. Also it does not change from blowing underneith by your feet or in the dash. I can't seem to figure out what is going on. Please Help!
Burning Brakes
Joined: Apr 2001
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From: Ponderables, yes. My opinion, not totally. Preaching...I don't have a pulpit. Fact and generalizations about what I am reading on behalf of what you tell me...absolutely.
Blower Control Module...just had mine replaced. Exact same issue. Check in fuse box in passenger footwell to see if maxifuse 49 is good. If not, replace the fuse. If it is, the blower module might be the problem.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Do you have the problem when the A/C is off?? Does it have the same problem when you run the system without the AC on. Does all of your air blow out the defrost vent???????
BC
BC
Thread Starter
Instructor
Joined: May 2004
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From: Dublin Ca
Originally Posted by Bill Curlee
Do you have the problem when the A/C is off?? Does it have the same problem when you run the system without the AC on. Does all of your air blow out the defrost vent???????
BC
BC
Le Mans Master
Joined: Dec 2003
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From: That dam place where it rains all the time
Originally Posted by lioninavette
Blower Control Module...just had mine replaced. Exact same issue. Check in fuse box in passenger footwell to see if maxifuse 49 is good. If not, replace the fuse. If it is, the blower module might be the problem.
Burning Brakes
Joined: Apr 2001
Posts: 1,133
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From: Ponderables, yes. My opinion, not totally. Preaching...I don't have a pulpit. Fact and generalizations about what I am reading on behalf of what you tell me...absolutely.
It cost me roughly $400 to fix (part and labor). Car was in shop for 2 days. I took it in, told them what was wrong with it, even told them the part to replace, and they still did a full diagnostic check because there wasn't anything in the documentation to lead them directly to the part (so they said). Anyway, it's all good now.
Team Owner
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From: This vette goes to 11 Milford MA
St. Jude Donor '03-'05
When mine did that, it ended up being a cracked vacuum line under the battery. Pull the hush panel on the pass side and see if the purple line has vacuum.
Race Director
Joined: Dec 2002
Posts: 10,233
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From: Baltimore suburbs Maryland
What "hush panel" is this on the passenger side?
Im also having trouble (well, been having trouble) with my AC. I tried to fix it today to no avail. At first I thought it was the vaccuum line thats behind the intake manifold that gets pulled off when you move the intake manifold to do the oil pressure service.
I also tried to pull the #26 fuse in the pass. foot well, but that also didnt do anything. This is really frustrating me, does anybody have a definate solution to this? My blower is working fine, just I cant direct where it is going.
PS Im not paying any dealer to do the work cause it'll be in the hundreds of $ range, i'd rather sit and let the windows get foggy.
Im also having trouble (well, been having trouble) with my AC. I tried to fix it today to no avail. At first I thought it was the vaccuum line thats behind the intake manifold that gets pulled off when you move the intake manifold to do the oil pressure service.
I also tried to pull the #26 fuse in the pass. foot well, but that also didnt do anything. This is really frustrating me, does anybody have a definate solution to this? My blower is working fine, just I cant direct where it is going.
PS Im not paying any dealer to do the work cause it'll be in the hundreds of $ range, i'd rather sit and let the windows get foggy.
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Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
C5JOSH
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
Thread Starter
Instructor
Joined: May 2004
Posts: 114
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From: Dublin Ca
Originally Posted by Bill Curlee
C5JOSH
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
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From: Just trying to make it through each day.
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St. Jude Donor '03-'04
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From: Just trying to make it through each day.
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St. Jude Donor '03-'04
Originally Posted by Bill Curlee
C5JOSH
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
I just looked. How the hell do you know whish is the vacuum line on the manifold? Is it literally connected to the back of the manifold? And is this the tube that goes to round thing under the passenger foot area?
Last edited by Buckmaster; Jul 22, 2004 at 08:53 PM.
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St. Jude Donor '03-'04
Originally Posted by lioninavette
Blower Control Module...just had mine replaced. Exact same issue. Check in fuse box in passenger footwell to see if maxifuse 49 is good. If not, replace the fuse. If it is, the blower module might be the problem.
Burning Brakes
Joined: Apr 2001
Posts: 1,133
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From: Ponderables, yes. My opinion, not totally. Preaching...I don't have a pulpit. Fact and generalizations about what I am reading on behalf of what you tell me...absolutely.
Buckmaster...
I am not sure what it looks like as the dealer performed the work. The part is under the dash on the passenger side. My problem was similar to yours where the fan was blowing full speed, rather than not working at all. Either way...looks like you have one of the two scenarios listed in this post. It's not hard to have fixed...just a PITA!
I am not sure what it looks like as the dealer performed the work. The part is under the dash on the passenger side. My problem was similar to yours where the fan was blowing full speed, rather than not working at all. Either way...looks like you have one of the two scenarios listed in this post. It's not hard to have fixed...just a PITA!
1st Gear
Joined: Feb 2010
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I have and electronic A/C module in my C5 and my blowers work fine, but my clutch isn't in gauging. My A/C light stays on for a couple of seconds and go's out. I check the freon and fuzes,relays and its still not working. HELP PLEASE!!!