a/c temperature at dash vents

92astro · Post by **92astro** » Fri May 23, 2008 8:32 pm

i have a 1992 astro so what should the a/c temp. coming out of the vents on max a/c mode? also can i put in a electric fan for the a/c which it would only come on with the a/c is on but i will still keep my clutch fan can i do this? and how?

peter · Post by **peter** » Sat May 24, 2008 2:34 am

I believe it should be down around 40-45* I know it's much colder than in a typical land-based a/c system, which is usually at 55*F.
Most definitely, you can use an electric to run while the a/c compressor is on. It'd definitely help slow-speed traffic a/c performance.
Run a fan on the front side of the condenser, feed it thru a relay which gets its control signal from the a/c compressor voltage. Run a wire from the battery to the switching contacts of this relay and Bob's your uncle

Southern · Post by **Southern** » Sat May 24, 2008 7:26 am

The average A/C air discharge temp should be between 36 - 43 Deg F provided the temp of the air entering the condenser is between 70 - 90 Deg F. This info is from the factory manual.

My 92 still blows cold air with the factory R12.

92astro · Post by **92astro** » Sat May 24, 2008 10:34 am

see when i checked the temp. out of the vent it was 53.8f that was before i fix the vacume leak for the a/c controls where the air was going to the defrost, floor and face vents. i will have to checked the temp. since the air vents are working!! it does chill the van down very quick even after IT HAS been sitting in the sun for a couple of hours so i know it is working. i am gonna check the temp. when i have the a/c on max a/c.

SoCalli V8 · Post by **SoCalli V8** » Sat May 24, 2008 1:11 pm

I recommend that you buy a set of cheap guages like these http://www.harborfreight.com/cpi/ctaf/d ... mber=92649 so that you know what pressures are going on inside your A/C system to help us diagnose your problem further.

Southern · Post by **Southern** » Sat May 24, 2008 7:13 pm

Those gauges won't work on his 92 if he still has the original R12 freon. The connectors will only work on the R134 systems, there are no quick disconnects on the older R12 systems.

SoCalli V8 · Post by **SoCalli V8** » Sat May 24, 2008 9:43 pm

Oh, you still have an old R12 system.....? You are gonnna need different connectors then.

92astro · Post by **92astro** » Sun May 25, 2008 10:19 am

my a/c is not r-12 anymore, i converted it to r-134a and i really don't have a problem with the front a/c it blows ice cubes

so it works great the air is colder than it was with the r-12. the temp. pulles down pretty quick some people say they had bad results with r-134a retrollfit, but my came out better than the r-12

only thing wrong up front is the high speed does not work i know it is the relay i just have not replaced it yet. but my rear a/c does not blow cold the liquad line going back to the rear is hot there is no rear heat. i have not done anymore checking yet but will.

92astro · Post by **92astro** » Mon Jul 21, 2008 8:02 pm

my a/c in my 1992 astro seems to be working really good today in oklahoma it was 100 degrees plus well i used my a/c i put it on max a/c and blower on med high cause high speed i need to replace the relay but anyways i checked the temp. coming out of the vents it was 50 degrees after about 5-6 mins of driving on the highway then tonight i did the same thing but after it got pretty cool arould 50 degrees again i turned the fan down to med. the temp. went down to 48-47 degrees what do you all think?

peter · Post by **peter** » Tue Jul 22, 2008 2:45 am

Although I've been in the HVAC field forever, my specialty is commercial/industrial, so I'm not too familiar with automotive applications. I know that the air comes outta there damn colder than 50* when the outdoor temps are in the 80's. So maybe 50* is normal for 100* weather.
And it is normal for the air to come out colder with less airflow.

92astro · Post by **92astro** » Tue Jul 22, 2008 6:12 pm

yeah that was the temp. have only driven 10 min and it was 120 inside my van when i started the a/c it droped to 50 degrees or soo within 3-4 miles!

6spd_monte · Post by **6spd_monte** » Thu Jul 24, 2008 10:24 pm

I did install a pusher fan on the front of my condenser to help out the ac. I made custom brackets, hand bent an ac pipe, relocated my trans cooler, it was awesome. I posted a write up on it in the how to section when it was finished about a year ago, but now it's gone?
Sadly I can't report on how it affected the ac performance because I still need a new compressor, but I fully expect that it will be awesome ...once I replace that compressor...

astrozam · Post by **astrozam** » Fri Jul 25, 2008 7:02 am

6spd_monte wrote:I did install a pusher fan on the front of my condenser to help out the ac. I made custom brackets, hand bent an ac pipe, relocated my trans cooler, it was awesome. I posted a write up on it in the how to section when it was finished about a year ago, but now it's gone?

James, good news/bad news, your memory is still intact

you did in fact upload that project to our H2 section, the bad news is... that was our OLD H2 section, the good news is I have a copy of that project because I made a back-up
of all those old H2'S... the bad news is I'm lazy and all the info from the old H2'S has to be moved over manually,which can be painstakingly slow.The good news is... YOUR STILL ALIVE AFTER THAT HORENDOUS MTB ACCIDENT and therefore... I will move your H2 to the top of the list for transferring over to our new H2 ( Tech gallery ) sometime in the next few days when I get a chance

LiftedAWDAstro · Post by **LiftedAWDAstro** » Fri Jul 25, 2008 9:45 pm

Bad news...zam just got another case of Canadian!

astrozam · Post by **astrozam** » Fri Jul 25, 2008 9:50 pm

LiftedAWDAstro wrote:Bad news...zam just got another case of Canadian!

LMAO

Chevy & GMC Vans

Chevy & GMC Vans

a/c temperature at dash vents

a/c temperature at dash vents

Re: a/c temp.

Re: a/c temp.

Re: a/c temp.

Re: a/c temp.

Re: a/c temp.

Re: a/c temp.

Re: a/c temp.

a/c temps.

Re: a/c temps.

Re: a/c temperature at dash vents

Re: a/c temperature at dash vents

Re: a/c temperature at dash vents

Re: a/c temperature at dash vents

Re: a/c temperature at dash vents