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GMC Safari/Chevy Astro Heating / Cooling

365 messages,  Last post on Feb 18, 2013 at 9:47 AM

You are in the GMC Safari & Chevy Astro Forum.

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

Messages Page 19 of 37

#177 of 365 blower motor problems by dannyboy8793

Dec 06, 2008 (3:04 pm)

I have a 2005 Chevy Astro van and the blower motor doesn't always work, it seems good when i start the van after sitting all night it works ( all speeds ) then if i turn the van off most of the time it doesn't work when i start it back up again and this may last an hr then it comes on and once its on everything is fine untill i turn off the van again.
 any ideas would help thanks.

#178 of 365 Re: blower motor problems [dannyboy8793] by eriklane

Dec 06, 2008 (6:21 pm)

Replying to: dannyboy8793 (Dec 06, 2008 3:04 pm)
These vans require that all vaccum lines are intact with no breakdowns/deterioration. Validate all of them first. Check all fuses both under dash and under hood. Then, there are 'blower resistors', usually one near the heater assembly under the hood (my 1996 front B.R. is right in the housing for the air conditioner evaporator. It has a large wiring harness going to it. One of my leads shorted out...Take out the rear seats in the van if you have rear heat, and check the blower resister there also...

#179 of 365 2003 ASTRO VAN BLOWER MOTOR by bassman3112

Dec 10, 2008 (9:25 am)

What is the easiest way to change out the blower motor? It is located way back in the passenger side of the engine compartment. It seems to have a plastic shroud around it.

#180 of 365 Re: Heater only works sometimes????? [jet460fd] by westal

Dec 23, 2008 (10:52 pm)

Replying to: jet460fd (Jan 18, 2008 8:31 pm)
this blend door you speak of when i tore my dash apart there as a door that opens and closes when i switch the dial from hot to cold. is this it?? or is there another door behind thecore??

#181 of 365 Re: Heater only works sometimes????? [westal] by eriklane

Dec 24, 2008 (1:21 pm)

Replying to: westal (Dec 23, 2008 10:52 pm)
I believe that's it. My rear heat wasn't working, but finally did after I removed it and drained it out, etc. Then, I also swapped out the vaccum tube in front on the diverter...

#182 of 365 Re: blower motor problems [dannyboy8793] by cstyle

Dec 27, 2008 (10:09 pm)

Replying to: dannyboy8793 (Dec 06, 2008 3:04 pm)
IF YOU CAN'T CONTROL THE VENTS THAT THE AIR/HEAT COMES OUT OF YOU MY WANT TO CHECK YOU VACUUM HOSE.

#183 of 365 1999 astro blower goes on & off by onemanonevan

Dec 28, 2008 (2:29 pm)

I've read a lot of post, and never saw this problem. The blower works when it wants to (all speeds). Hit a hard bump and it sometimes comes on. The other day, I released the emerg. brake hard and it came on. Apparently not a vaccum problem. Air is directed to correct vents. Ground connection perhaps???

#184 of 365 Re: 1999 astro blower goes on & off [onemanonevan] by eriklane

Dec 28, 2008 (6:18 pm)

Replying to: onemanonevan (Dec 28, 2008 2:29 pm)
I'd still say its vaccum. I used to slam my hand on the dash and it'd work, then fail...But, do also check your electrical switches with a meter. They could be faulty.

#185 of 365 No Heat At Idle by westal

Jan 08, 2009 (10:02 pm)

Recently replaced heater core because it blew out and leaked all over!! Had great heat before change of heater core, but now with new one no heat at idle. Took it into repair shop, they changed out the heater core again, changed out water pump, and still no damn heat at idle. But at high revs awesome heat. Tried to burp system to get air out. But there doesn't seem to be any air in there?!!? Any suggestions on what to do this is getting really frustrating in this -50 weather we have been having in Saskatchewan.

#186 of 365 Re: No Heat At Idle [westal] by duecekd

Jan 09, 2009 (11:18 am)

Replying to: westal (Jan 08, 2009 10:02 pm)
I am not a mechanic, but my 1st thought is the thermostat not working correctly. When you 1st start the van, watch your temp gauge. It should rise (mine gets to about 250F) then you'll see it drop noticeably. This is when the thermostat opens, which circulates the radiator fluid through engine and heater core. If you don't see it do this, it could be stuck open, in which the fluid doesn't stay hot unless it is running hard. For a quick fix, sometimes you can tap on the thermostat housing (don't beat it to death, you could break the metal) and it will break loose and work for awhile. But if this is the case, it needs to be replaced in any instance.
That's my opinion, if anyone with more mechanic knowledge can correct or add to it, please help this brother out, HE'S FREEZING!!!

Messages Page 19 of 37

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