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GMC Safari/Chevy Astro Heating / Cooling

237 messages,  Last post on Nov 19, 2009 at 8:56 PM

You are in the GMC Safari & Chevy Astro Forum. Your Host is Karens

What is this discussion about? GMC Safari, Chevrolet Astro, GMC Safari Cargo, Heating / Cooling, Van


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#166 of 237
Re: astro van playing tricks now [miceli] by eriklane
Jan 28, 2008 (6:43 am)
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Replying to: miceli (Jan 28, 2008 6:28 am)

Ok-I have a line that runs across the top of the motor from driver to pass side. It then connects to the front and rear heater control valves. It does have suction.
 
I think one of them also runs down to the pass. side bulb behind the wheel.
 
Where do the ported/manifold lines run?
#167 of 237
rear heater blows cold by turbocrx1
Mar 04, 2008 (11:36 pm)
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my rear heater on my 98 astro blows cold only. i've checked the heater core vacuum lines and coolent lines, everythings seems fine. Front heat blows hot, but rear lines are always cold. if anyone can help me . just bought the van last week.
#168 of 237
Re: 98 astro-good heat on max a/c-poor heat normally [bbri67] by swainson
Mar 10, 2008 (4:06 pm)
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Replying to: bbri67 (Jan 17, 2007 7:22 pm)

check the vacuum line that goes from the vac switch near the right hand door under the dash to the base of the carb
#169 of 237
thermal problem with aircondition fan by jlk2
Apr 27, 2008 (1:47 pm)
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I have a 1996 Astro with rear air. For some time now when the car sits in the heat the blower motor will not come on when I start the car. While driving at high speed cool air will come from the vents and after a few minutes the fan will work again. All speeds are out when it does not work. The fan switch failed a month ago and I thought that was my problem and had it replaced. When the mechanic put the switch in he could not get the fan to work, then all of a sudden it did and he could not get it to fail again. It was fine for a few weeks with the new fan switch but today it would not run when the car was out in the sun for couple hours. Any ideas on what the problem is? The rear fan works.
#170 of 237
Partial use of climate controls by chucknc
Apr 28, 2008 (10:36 am)
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I have checked the vacuum line that gives most of the problems and it is ok. My problem is that only the A/C, bi-level floor and mid-vents, and defrost selections work. If I select Max A/C, floor, mid-vents, or bi-level defrost and floor, then the blower doesn't come on at all. Where do I need to start looking?
#171 of 237
94 safari AC/blower problems by mb1701d
May 16, 2008 (7:39 am)
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(1) Blower motor operation was intermitant, only worked on 2 speeds and finally died.Replaced it and all was well for couple of weeks, then only working on 2 highest speeds. Replaced resistor pack(from dealership) and all was well for 2 days now only 2 highest speeds working.
  
(2) AC not coming on. Had this problem last spring and found that if I turned on the fan first then slid the control down to AC it came on and worked fine (worked all of last year). Now that its warming up outside I've tried this trick but no luck.
Any suggestions much appreciated
#172 of 237
Blower Motor resitor / harness melting by tstorm
Jul 17, 2008 (6:29 am)
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Hello, I'm new to this forum. I've got a 97 Safari and recently the blower motor would not work on high but worked on the other 3 settings. I read this forum yesterday on this subject and found some very useful information. I found out that the wiring harness going to the resistor was melted and burned on the red wire connection. I'm assuming the red wire controls the high setting on the blower motor. I cleaned the connections and scrapped out the melted plastic out of the resistor. The blower works on high now but I'm concerned that the problem will happen again, I'm sure there is a reason the red wire got so hot to melt the plastic in the first place. First question: Do I need a new blower motor... could it be going bad and taking more energy to turn it on high than normal? Second question: The wiring harness connector plug that is melted looks like it goes down and under the radiator, I'm not sure where it goes (haven't looked yet) do I need to change the whole harness or is there a replacement plug that can added ? I would greatly appreciate any shared experiences. These vans seems to have their fare share of problems and now that I've found this forum I'll be happy to help others and gladly accept advise.
 
Thanks!
#173 of 237
Re: Climate Control Fan [jpallardi] by spitt
Sep 01, 2008 (1:38 pm)
Reply

Replying to: jpallardi (May 02, 2005 9:40 pm)

All you people with electrical problems on the GMC Van,
  
I have air conditioning problem on my 2000 Astro AWL van; remote door locks problems since I purchased it; interior lights staying on and draining my battery; gas gauge that has fooled me a couple of times and left me stranded a couple of times; ABS light that will not shut off until I decided to pull the fuse off; rear defogger that does not work; radio lights burnt out; and now, for some reason, when I used my remote to lock the door, my horn comes on which, it never did before when I purchaed the van. Every two of three months, I get a call from my dealership to bring the van in for maintenance and every time it goes into the shop, a few months later, something else crops up. Something is fishy there you all.
 
We should all get together and do something about this. We are being bled dry from whoever purposely and us, suckers, we're being led to the slaughter house very subtly.
 
Fed up of giving the dealership my hard-earned money on a piece of crap
#174 of 237
power locks by pops9
Oct 07, 2008 (2:25 pm)
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changed the battery in my 2002 Astro van because it was 5 years old had no starting problems ever since I changed it the power locks & dome light go on & off when I hit a bump & the front bounces or make a turn the battery is secure and the cables are tight & clean at the battery & starter all I did was replace the battery I even took the new battery back thinking it had a loose plate but it does the same thing with the second battery any ideas
#175 of 237
2001 Astro Rear Heater Core Problems by isrena
Oct 15, 2008 (5:53 am)
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Hi, I have water in the back of my 2001 astro. I am assuming the heater core is leaking back there since we do have to keep adding water. Can anyone tell me where it is located and is this something that someone with moderate mechanical background should tackle? Any help would be greatly appreciated. Thanks,

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