Air vent problems... again

ZQ8 Blazer · 04-13-2009, 04:56 AM

Ok last fall my vents weren't switching between one another, come to find out I needed new vacuum hoses and that fixed it. About 2 weeks ago after I turn the air off and I have it coming out at my face it still blows like it's on 1, if I have it at my feet it still feels like it's at 1 but here's the funny thing it seems that if I'm going up a hill it goes from my feet to my face, atleast that's the only time I notice it. Anyone have a clue what would cause this?

t01blaze · 04-13-2009, 02:36 PM

Quote: Originally Posted by ZQ8 Blazer

it seems that if I'm going up a hill it goes from my feet to my face, atleast that's the only time I notice it. Anyone have a clue what would cause this?

The HVAC system is losing vacuum under load causing it to switch on you??

SH-60B · 04-13-2009, 03:38 PM

ZQ8 Blazer · 04-13-2009, 06:22 PM

I wonder where else I need to look?

t01blaze · 04-14-2009, 08:19 AM

are you supposed to have a vacuum canister hooked up?

ZQ8 Blazer · 04-14-2009, 08:40 AM

yeah, but I haven't had one for 2 years now and I just started having this problem.

S10dude · 04-14-2009, 09:23 AM

has to be a small leak somewhere to cause shift in vent...

t01blaze · 04-14-2009, 09:27 AM

maybe double check the connector behind the glove box door?

there isn't a hissing from the HVAC controll head is there? (oh noes, ATF!)

ZQ8 Blazer · 04-14-2009, 04:59 PM

Quote:

has to be a small leak somewhere to cause shift in vent...

As soon as it's decent outside I'm going to take a look.

Quote:

maybe double check the connector behind the glove box door?

there isn't a hissing from the HVAC controll head is there? (oh noes, ATF!)

Ok I'll check that. I plug the gray line in the winter to fix the floor heat problem so it could possibly be that.

I thought the hissing was from where someone secretly installed a supercharger on my Blazer... Naw no hissing.

04-13-2009, 04:56 AM	#1
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,723 Location: Western, Ky User is: OffLine	Air vent problems... again Ok last fall my vents weren't switching between one another, come to find out I needed new vacuum hoses and that fixed it. About 2 weeks ago after I turn the air off and I have it coming out at my face it still blows like it's on 1, if I have it at my feet it still feels like it's at 1 but here's the funny thing it seems that if I'm going up a hill it goes from my feet to my face, atleast that's the only time I notice it. Anyone have a clue what would cause this?
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04-13-2009, 02:36 PM	#2
t01blaze rollin' on 33's Age: 24 Join Date: Mar 2009 Posts: 416 Location: South Jersey User is: OffLine	Re: Air vent problems... again Quote: Originally Posted by ZQ8 Blazer it seems that if I'm going up a hill it goes from my feet to my face, atleast that's the only time I notice it. Anyone have a clue what would cause this? The HVAC system is losing vacuum under load causing it to switch on you??
	[Reply w/Quote]

04-13-2009, 03:38 PM	#3
SH-60B Registered Neanderthal Join Date: Nov 2007 Posts: 2,335 Location: Meriden/CT/USA User is: OffLine	Re: Air vent problems... again
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04-13-2009, 06:22 PM	#4
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,723 Location: Western, Ky User is: OffLine	Re: Air vent problems... again I wonder where else I need to look?
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04-14-2009, 08:19 AM	#5
t01blaze rollin' on 33's Age: 24 Join Date: Mar 2009 Posts: 416 Location: South Jersey User is: OffLine	Re: Air vent problems... again are you supposed to have a vacuum canister hooked up?
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04-14-2009, 08:40 AM	#6
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,723 Location: Western, Ky User is: OffLine	Re: Air vent problems... again yeah, but I haven't had one for 2 years now and I just started having this problem.
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04-14-2009, 09:23 AM	#7
S10dude workin it ! Join Date: May 2006 Posts: 11,029 Location: Sacramento,Ca. User is: OffLine	Re: Air vent problems... again has to be a small leak somewhere to cause shift in vent...
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04-14-2009, 09:27 AM	#8
t01blaze rollin' on 33's Age: 24 Join Date: Mar 2009 Posts: 416 Location: South Jersey User is: OffLine	Re: Air vent problems... again maybe double check the connector behind the glove box door? there isn't a hissing from the HVAC controll head is there? (oh noes, ATF!)
	[Reply w/Quote]

04-14-2009, 04:59 PM	#9
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,723 Location: Western, Ky User is: OffLine	Re: Air vent problems... again Quote: has to be a small leak somewhere to cause shift in vent... As soon as it's decent outside I'm going to take a look. Quote: maybe double check the connector behind the glove box door? there isn't a hissing from the HVAC controll head is there? (oh noes, ATF!) Ok I'll check that. I plug the gray line in the winter to fix the floor heat problem so it could possibly be that. I thought the hissing was from where someone secretly installed a supercharger on my Blazer... Naw no hissing.
	[Reply w/Quote]