A/C problem...

neonstorm7 · 09-14-2004, 04:55 PM

Hi all, I have a problem with my '96 Blazer's A/C.

At a stop/very low speeds, the A/C blows kinda cold. As I start going faster, the air gets warmer and warmer. I noticed that when it's set to max, I lose alot of air pressure to the floor vents. I thought that may be the problem, so I covered them up. I now get alot more pressure from the dash vents, but it still isn't very cold. I checked the freon levels, and they're fine.

I've also noticed that if the air is turned off, when I reach high speeds a steady flow of air still comes from the vents.

That leads me to my hypothesis. Obviously the flaps that control the airflow are messed up. It seems to me the outside air is being forced in through the cowl vents and out through the dash vents.

Is it safe to cover these cowl vents up somehow? It would be super tacky and all, but at least I would have cool A/C (especially essential here in Florida).

Help!

ballablaza · 09-27-2004, 03:26 PM

i have the same problem in my 95, it doesnt blow cold air at all
when on & idling i can hear a ticking noise coming from the compressor & engine idles rear rough
when driving with a/c off i can feel warm air coming from under the dash
at the beggining of the summer i had to get a new condensor so i took it to a shop and had the lines sealed, vaccumed, & checked for leaks & it worked good for about 1 month.
i have no clue what is wrong with it, any help will be appreciated

ballablaza · 10-12-2004, 12:37 AM

anyone have any info on this problem?

Slacker · 10-12-2004, 12:48 AM

I have the ticking on my 'noma as well. Also, when I take sharp corners, the hair blows warm. I don't really worry about it, I don't use my A/C much.

twodoorblazer · 10-26-2004, 02:24 AM

Quote: Originally Posted by neonstorm7

I've also noticed that if the air is turned off, when I reach high speeds a steady flow of air still comes from the vents.

:

This is normal, all 4.3's have this occurence, then the HVAC is off, you still have a lot of air coming though the vents at HWy speeds. I hate it too, it's one of those odd cheap chevy things.

Slacker · 10-26-2004, 02:36 AM

Quote: Originally Posted by twodoorblazer

This is normal, all 4.3's have this occurence, then the HVAC is off, you still have a lot of air coming though the vents at HWy speeds. I hate it too, it's one of those odd cheap chevy things.

It's a "Safety Feature".

twodoorblazer · 10-26-2004, 03:57 AM

Quote: Originally Posted by Slacker

It's a "Safety Feature".

how so?

Slacker · 10-26-2004, 09:41 AM

Search for it on the forum, it's to prevent CO buildup in the cab, there is a mod to disable it.

mat1583 · 10-26-2004, 09:48 AM

I don't know why you'd want to disable it though. If it's blowing warm air, just turn it to the cold setting on the A/C and it shouldn't be that warm. I don't like the idea of disabling safety features...even if it is a cheap feature.

Slacker · 10-26-2004, 11:59 AM

Well it never blows cool air, it's always hot.

twodoorblazer · 10-26-2004, 03:27 PM

I have never driven any other car that has this feature of so much airflow, and yes, I am aware of the gray vaccum line plug mod to disable it as well.

vinnie28 · 12-06-2004, 01:45 PM

How I can made that mod? The problem that I have is that I can get intoxicated with the CO of some unconcious drivers with crappy cars that throws smoke.

Please how can I disable exterior vent?

BLAZ1N · 12-06-2004, 05:44 PM

the "hot feet fix"
its on s-series forum.com

http://www.s-seriesforum.com/forum/s...t=hot+feet+fix

vinnie28 · 12-07-2004, 09:24 PM

Thank you!

Just resolved the problem, was not related with the gray vacuum line. The actuator that moves the outside-inside air circulation flap was not functioning. I just made the flap close and attached it with a tie-rap until someday I decide buy the actuator.

BTW, also plugged the gray line just in case. The A/C now blows super cool and no bad odors in the cab.

Take care!!!!

09-14-2004, 04:55 PM	#1
neonstorm7 Registered User Join Date: Mar 2003 Posts: 8 Location: User is: OffLine	A/C problem... Hi all, I have a problem with my '96 Blazer's A/C. At a stop/very low speeds, the A/C blows kinda cold. As I start going faster, the air gets warmer and warmer. I noticed that when it's set to max, I lose alot of air pressure to the floor vents. I thought that may be the problem, so I covered them up. I now get alot more pressure from the dash vents, but it still isn't very cold. I checked the freon levels, and they're fine. I've also noticed that if the air is turned off, when I reach high speeds a steady flow of air still comes from the vents. That leads me to my hypothesis. Obviously the flaps that control the airflow are messed up. It seems to me the outside air is being forced in through the cowl vents and out through the dash vents. Is it safe to cover these cowl vents up somehow? It would be super tacky and all, but at least I would have cool A/C (especially essential here in Florida). Help!
	[Reply w/Quote]

09-27-2004, 03:26 PM	#2
ballablaza its ya boyyy B weezy baby Age: 22 Join Date: Apr 2003 Posts: 34 Location: Lafayette, Louisiana User is: OffLine	Re: A/C problem... i have the same problem in my 95, it doesnt blow cold air at all when on & idling i can hear a ticking noise coming from the compressor & engine idles rear rough when driving with a/c off i can feel warm air coming from under the dash at the beggining of the summer i had to get a new condensor so i took it to a shop and had the lines sealed, vaccumed, & checked for leaks & it worked good for about 1 month. i have no clue what is wrong with it, any help will be appreciated
	[Reply w/Quote]

10-12-2004, 12:37 AM	#3
ballablaza its ya boyyy B weezy baby Age: 22 Join Date: Apr 2003 Posts: 34 Location: Lafayette, Louisiana User is: OffLine	Re: A/C problem... anyone have any info on this problem?
	[Reply w/Quote]

10-12-2004, 12:48 AM	#4
Slacker Stepsider Age: 25 Join Date: Nov 2003 Posts: 1,975 Location: Windsor, Ontario User is: OffLine	Re: A/C problem... I have the ticking on my 'noma as well. Also, when I take sharp corners, the hair blows warm. I don't really worry about it, I don't use my A/C much.
	[Reply w/Quote]

10-26-2004, 02:24 AM	#5
twodoorblazer CHANGE YOUR EMAIL ADDRESS Join Date: Aug 2003 Posts: 962 Location: User is: OffLine	Re: A/C problem... Quote: Originally Posted by neonstorm7 I've also noticed that if the air is turned off, when I reach high speeds a steady flow of air still comes from the vents. : This is normal, all 4.3's have this occurence, then the HVAC is off, you still have a lot of air coming though the vents at HWy speeds. I hate it too, it's one of those odd cheap chevy things.
	[Reply w/Quote]

10-26-2004, 02:36 AM	#6
Slacker Stepsider Age: 25 Join Date: Nov 2003 Posts: 1,975 Location: Windsor, Ontario User is: OffLine	Re: A/C problem... Quote: Originally Posted by twodoorblazer This is normal, all 4.3's have this occurence, then the HVAC is off, you still have a lot of air coming though the vents at HWy speeds. I hate it too, it's one of those odd cheap chevy things. It's a "Safety Feature".
	[Reply w/Quote]

10-26-2004, 03:57 AM	#7
twodoorblazer CHANGE YOUR EMAIL ADDRESS Join Date: Aug 2003 Posts: 962 Location: User is: OffLine	Re: A/C problem... Quote: Originally Posted by Slacker It's a "Safety Feature". how so?
	[Reply w/Quote]

10-26-2004, 09:41 AM	#8
Slacker Stepsider Age: 25 Join Date: Nov 2003 Posts: 1,975 Location: Windsor, Ontario User is: OffLine	Re: A/C problem... Search for it on the forum, it's to prevent CO buildup in the cab, there is a mod to disable it.
	[Reply w/Quote]

10-26-2004, 09:48 AM	#9
mat1583 Searching no more Age: 26 Join Date: Jun 2004 Posts: 2,458 Location: Madison, Alabama User is: OffLine	Re: A/C problem... I don't know why you'd want to disable it though. If it's blowing warm air, just turn it to the cold setting on the A/C and it shouldn't be that warm. I don't like the idea of disabling safety features...even if it is a cheap feature.
	[Reply w/Quote]

10-26-2004, 11:59 AM	#10
Slacker Stepsider Age: 25 Join Date: Nov 2003 Posts: 1,975 Location: Windsor, Ontario User is: OffLine	Re: A/C problem... Well it never blows cool air, it's always hot.
	[Reply w/Quote]

10-26-2004, 03:27 PM	#11
twodoorblazer CHANGE YOUR EMAIL ADDRESS Join Date: Aug 2003 Posts: 962 Location: User is: OffLine	Re: A/C problem... I have never driven any other car that has this feature of so much airflow, and yes, I am aware of the gray vaccum line plug mod to disable it as well.
	[Reply w/Quote]

12-06-2004, 01:45 PM	#12
vinnie28 Registered User Join Date: Dec 2003 Posts: 4 Location: User is: OffLine	Re: A/C problem... How I can made that mod? The problem that I have is that I can get intoxicated with the CO of some unconcious drivers with crappy cars that throws smoke. Please how can I disable exterior vent?
	[Reply w/Quote]

12-06-2004, 05:44 PM	#13
BLAZ1N I'm probably drunk. Age: 25 Join Date: Aug 2003 Posts: 8,651 Location: Miami Beach, FL User is: OffLine	Re: A/C problem... the "hot feet fix" its on s-series forum.com http://www.s-seriesforum.com/forum/s...t=hot+feet+fix
	[Reply w/Quote]

12-07-2004, 09:24 PM	#14
vinnie28 Registered User Join Date: Dec 2003 Posts: 4 Location: User is: OffLine	Re: A/C problem... Thank you! Just resolved the problem, was not related with the gray vacuum line. The actuator that moves the outside-inside air circulation flap was not functioning. I just made the flap close and attached it with a tie-rap until someday I decide buy the actuator. BTW, also plugged the gray line just in case. The A/C now blows super cool and no bad odors in the cab. Take care!!!!
	[Reply w/Quote]