Last post on Oct 13, 2013 at 2:35 PM
You are in the GMC Safari & Chevy Astro
What is this discussion about?
GMC Safari, Chevrolet Astro, GMC Safari Cargo, Heating / Cooling, Van
#268 of 371 Re: Safari A/C problems [englishmom6]
Sep 26, 2010 (8:44 am)
On 09/06/2010 I had posted a "trouble w/ my front ac vents on a 2005, Chevy Astro van not allowing the ac to flow out" question. The gentleman that assisted me told me abou a possible HOSE problem! That hose problem was NOT a $200+ mechanic job but marely a $3.50 hose problem that took my boyfriend a a short 1 hour start to finish job. Please check your ac hoses....so simple and so obvious that it totally floored me! Best of luck.
#269 of 371 Re: 2000 chevy astro [bdar]
Sep 26, 2010 (9:09 am)
I'm having same fan thru defrost vents only problem with my Astro van. Could you maybe help me out as well?
Thanks so much.
#270 of 371 Re: Safari A/C problems [englishmom6]
Sep 26, 2010 (12:19 pm)
Sorry i didn't respond earlier. I got the email notification about your post, but I forgot to get on the forum and message you. Just post an email address and I will email you the Vacuum Diagram and the instructions on how to fix the problem. This problem is a simple one and caused by the plastic vacuum lines breaking apart and so the AC unit doesn't have any vacuum (suction) to push the air through the vents and it just comes out of the defrost.
#271 of 371 Re: 2000 chevy astro [ohmickey63]
Sep 26, 2010 (12:20 pm)
Just post your email address for me and I will email you the vacuum diagram and the information on how to fix the problem.
#272 of 371 Information for Vacuum Line Repair Problem
Sep 26, 2010 (12:23 pm)
I just wanted to post my instructions for the vacuum line repair problem where the air blows out of the Defrost Vents only and not the front vents. It is an annoying problem, but certainly very cheap and easy to fix with a little work and some cheap parts. I also have the vacuum diagram, but I am not sure how to post it on the forum so if you need a copy, just post your email address and I will email you a copy of it.
I have the vacuum Diagram for a 97' Chevy Astro and from what I understand it should be the same for all the upper model astros and I think the GMC Safarri's as well (But I am not sure about the GMCs). If you are having the air come out from the defrost and not from the vents, you should check 3 critical areas. So I will try to explain it to you as best as I can. So if you are standing in front of the Astro and open the hood, you would look to your left hand side first. There is a big black box like thing all the way to the left (and that is the ac blower fan). Right beside that, there is a medium size silver canister that should have tubes coming out from it. That is the AC condenser and that is where you would recharge Freon to the car. Right next to the canister (on the right side, tucked in a little) you should find some sort of a t-connector with three vacuum hoses connected to it, Once should be going into the firewall (the wall of the car going into the vehicle, one should be going down towards the bottom of the car, and the other should be going to the right. Most likely, the one going to the right is the one that is broken. That one passes to the right by the alternator and other things on its way to the engine manifold where it connects in. That area is extremely hot (when the car is on) and that is why those vacuum lines tend to break down quickly (Thank Chevy for their stupid designs, LOL). It may take some bending and moving with your hand to get into those tight spaces to reach the other end of the vacuum hose. They sell replacement vacuum hose/tubing at Napa Auto Parts by the foot, and they have vacuum connector heads in multi-packs at Auto Zone. Basically, you will have to build your own new vacuum tube with a head on each end, one to connect into the t-connector and one to connect on the engine manifold. I would make the tube a bit longer so you can position it away from the hotter parts of the car and you can use plastic strapping ties to secure it so that it doesn't get caught in any gears belts, etc.
That should solve the problem. If it doesn't, I would check the second line from the t-connector going down to the bottom of the car. That line connects into the vacuum ball underneath the car. The vaccum ball is located underneath the car by the right front tire (in the same area as directly underneath the condenser. So you would have to get on the ground and slide underneath the car (Head first) and look with a flashlight underneath the front and you will find the vacuum ball. It is a round plastic ball thing and it should have a vacuum line connected to it. Check the line and also check the ball for any cracks, etc. If the line is bad, change the line and then if the ball is bad, you can get a new one from the dealer and I also think AutoZone has them (Check their website). The ball clips on with two clips/screws to the metal of the car and you would have to pull away the plastic flap of the wheel wall to see those two screws.
Replies to this message:
- tchesebro (Oct 13, 2010 5:05 pm)
- josmoke21 (Oct 22, 2010 4:17 pm)
- gss56 (Nov 19, 2010 12:57 pm)
- daryllittle (Nov 20, 2010 5:40 pm)
- jtoldastro (Nov 24, 2010 8:51 am)
- mstickwood (Nov 27, 2010 6:29 am)
- kitara229 (Dec 05, 2010 1:50 pm)
- winkledorf (Mar 14, 2011 2:22 pm)
- jockoh (Mar 23, 2011 9:42 pm)
- dwlj_dj (May 20, 2011 5:50 pm)
- ptolley (Jun 07, 2013 8:50 am)
#273 of 371 Re: 2000 chevy astro [groove104]
Sep 27, 2010 (11:19 pm)
I would also like a copy of that diagram. Is it possible that you could send me a copy of it as well? Thanks for all you help on this topic. send to: bbeckwithshaw.ca
#274 of 371 Re: Information for Vacuum Line Repair Problem [bdar]
Oct 13, 2010 (5:05 pm)
Thank you for your very helpful post.
Please send me vacuum diagram for 2000 astro. Thanx
#275 of 371 Re: Information for Vacuum Line Repair Problem [bdar]
Oct 22, 2010 (4:17 pm)
please send pic of vacuum line fix,thank you
#276 of 371 Heater Problem
Nov 13, 2010 (6:02 am)
Have read the forum on Safari heat and cool problems. My problem is after starting the the van it throws heat when the temp. gauge is half way up to normal operating temp.Once it warms up to normal operating temp. the air goes luke warm and sometime cool,and once in a while it will throw hot air. It is hit and miss but normally it is cool air.I am going to change the thermostat today and see if that works.I have owned 3 of these vans and never had this problem ,just the rotted vaccuum which is common with these vans.Very good forum!
Any ideas on this problem. I will post tommorrow about the thermostat change to tell if it was the problem.
#277 of 371 97RIV update.
Nov 16, 2010 (4:03 am)
It wasn't the thermostat? I tore everything I could apart, the heater lines are hot ,the damper door on the passenger side stays shut till you put it on A/C then it opens.The vaccuum actuated mixing valve seems to work O.K as the arm goes up on full heat position and down on cold position.Every morning I start the van and it clears the windshield (we have frost here now ) the temp. gauge goes quqrter qway up then it stars to blow cool air? Could it be the heater control resister heats up and goes to cold? I'm stumped.