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
#49 of 371 Re: 2000 GMC Safari air-conditioning [pzmom]
Aug 15, 2005 (2:59 am)
I just fixed this same problem on my 2000 Astro last night. The vent system is vacuum operated and a vacuum leak will cause the symptom you have described. The most common cause on the Astro/Safari is a cracked vacuum line that runs across the top of the motor towards the front. The vacuum line is exposed to high heat continually and gets brittle and begins to crack in numerous places. The reduced vacuum causes the A/C vent selector to not operate properly. The vacuum line has 90 degree rubber elbows at each end and the rest of the line is very small diameter plastic tubing. One end it accessible under the hood on the left side near the A/C equipement, the other end is accessible if you pull the engine cover and is on the driver side of the intake manifold. I just replaced the whole vacuum line with rubber vacuum host and rerouted it off the top of the engine and put some shielding on it. HTH
#50 of 371 Re: 2000 GMC Safari air-conditioning [eharston]
Aug 16, 2005 (10:18 am)
There're lots of discussions on this subject on recent posts. What eharston posted is correct except that the entire job can be done from under the hood. It is a bigger job to remove the dog house than the actual repair. I found it out the hard way. You don't want to mess around with it.
#51 of 371 Re: 2000 GMC Safari air-conditioning [tkw]
Oct 23, 2005 (6:42 pm)
under the front hood remove the air box and u can see the small hard vacuum line where it has been damaged. One inch of rubber hose can connect the ends and a/c will return to blowing out every vent.
#52 of 371 Re: 2000 GMC Safari air-conditioning [davet2]
Oct 24, 2005 (8:10 am)
Thank you but I had it replaced & rerouted a while back. When that small vacuum line got brittle with engine heat & age, it just disintegrated in many pieces. Splicing was not an option in my case.
#53 of 371 Re: 2000 GMC Safari air-conditioning [pzmom]
Feb 24, 2006 (10:10 pm)
I've fixed this problem before by fixing a vacuum line on the intake manifold that goes to your ac.
#54 of 371 rear a/c blower
Aug 21, 2005 (5:58 am)
i have a '99 astro and yesterday the rear a/c blower quit. i checked the fuse, (#12) and it looks fine. also checked the a/c relay under the hood, but don't know how to tell whether its good or not. any suggestions? thanks
#55 of 371 Re: rear a/c blower [machicj]
Oct 02, 2005 (5:08 am)
I have a 95 astro van with dual a/c ,my blower motor stops on all speeds for a short time and starts up after a minute or less.Can someone tell me where a relay or thermal fuse could be located for this intermittent problem.I already replaced the blower motor since new.
#56 of 371 1994 Astro Blower Motor Woes
Aug 21, 2005 (8:09 am)
The Blower on my 1994 Astro will not blow on "High". The A/C Compressor remains engaged even though the fan doesn't blow. I replaced the Blower Control Switch in the dash thinking that would fix the problem. $29.00 later...the blower still will not blow on high. I am not an electrical whiz when it comes to trouble shooting . Any tips would be helpful before I go out and buy a resistor, fan motor,...a new van?
#57 of 371 Re: 1994 Astro Blower Motor Woes [a_recruiter]
Apr 21, 2006 (8:43 pm)
I have a similar problem on my 1996 Safari. The blower resistor pack died - the high speed went first, then the other speeds one by one. I replaced the pack with an econo Napa part, which died in the same manner after 2 weeks. I am currently trying to find the resistance specifications for the blower motor so I can see if the motor is killing the packs or if the econo brand simply wasn't up to the task - AJ
#58 of 371 AC compressor won't shut off
Aug 23, 2005 (4:57 pm)
I have an ac problem that I can't seem to find the answer for. Basically, the compressor won't shut off in any position of the vent dial, even if it's off or the heat is on. Any ideas?