Vaccum Problem

southpaw2_4 · 08-05-2008, 05:07 PM

There is a loud Hissing sound comming from the back of my Climate control switch. It appears that on our blazers they went to a vaccum control type system but what i can't figure out if if there is a leak or if the hose shouldn't be sucking that much air through it.

Please help

southpaw2_4 · 08-05-2008, 06:05 PM

Sorry the hissing sound is comming from the selector switch is what i meant. The Blue line going to it is sucking a lot of air and i am not sure if it is supposed to be or not. Maybe i need a new switch?

SH-60B · 08-07-2008, 07:15 PM

It's definately not supposed to be sucking air. A vacuum line may have come off or cracked. You'll need to get at the back of the selector switch to fix it.

southpaw2_4 · 08-07-2008, 07:18 PM

the line connection is fine...when i took the switch apart it only makes that hissing noise when the little black rubber piece goes on (the piece that directs the air flow). So i have a feeling its the switch that needs replacing. What i don't know is if its the blue line thats supposed to be the constant vaccum on my year.

ZQ8 Blazer · 08-19-2008, 06:46 AM

Mine does the same thing sometimes

SH-60B · 08-20-2008, 02:51 PM

Quote: Originally Posted by southpaw2_4

the line connection is fine...when i took the switch apart it only makes that hissing noise when the little black rubber piece goes on (the piece that directs the air flow). So i have a feeling its the switch that needs replacing. What i don't know is if its the blue line thats supposed to be the constant vaccum on my year.

IDK if it's the blue line or not, but how many "full time" vacuum lines could there be? More than one wouldn't make any sense.

southpaw2_4 · 08-20-2008, 02:54 PM

oh well i ordered a new unit and hopefully that solves the problem

08-05-2008, 05:07 PM	#1
southpaw2_4 Registered User Age: 27 Join Date: Feb 2007 Posts: 183 Location: Surrey, BC User is: OffLine	Vaccum Problem There is a loud Hissing sound comming from the back of my Climate control switch. It appears that on our blazers they went to a vaccum control type system but what i can't figure out if if there is a leak or if the hose shouldn't be sucking that much air through it. Please help
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08-05-2008, 06:05 PM	#2
southpaw2_4 Registered User Age: 27 Join Date: Feb 2007 Posts: 183 Location: Surrey, BC User is: OffLine	Re: Vaccum Problem Sorry the hissing sound is comming from the selector switch is what i meant. The Blue line going to it is sucking a lot of air and i am not sure if it is supposed to be or not. Maybe i need a new switch?
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08-07-2008, 07:15 PM	#3
SH-60B Registered Neanderthal Join Date: Nov 2007 Posts: 2,335 Location: Meriden/CT/USA User is: OffLine	Re: Vaccum Problem It's definately not supposed to be sucking air. A vacuum line may have come off or cracked. You'll need to get at the back of the selector switch to fix it.
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08-07-2008, 07:18 PM	#4
southpaw2_4 Registered User Age: 27 Join Date: Feb 2007 Posts: 183 Location: Surrey, BC User is: OffLine	Re: Vaccum Problem the line connection is fine...when i took the switch apart it only makes that hissing noise when the little black rubber piece goes on (the piece that directs the air flow). So i have a feeling its the switch that needs replacing. What i don't know is if its the blue line thats supposed to be the constant vaccum on my year.
	[Reply w/Quote]

08-19-2008, 06:46 AM	#5
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,723 Location: Western, Ky User is: OffLine	Re: Vaccum Problem Mine does the same thing sometimes
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08-20-2008, 02:51 PM	#6
SH-60B Registered Neanderthal Join Date: Nov 2007 Posts: 2,335 Location: Meriden/CT/USA User is: OffLine	Re: Vaccum Problem Quote: Originally Posted by southpaw2_4 the line connection is fine...when i took the switch apart it only makes that hissing noise when the little black rubber piece goes on (the piece that directs the air flow). So i have a feeling its the switch that needs replacing. What i don't know is if its the blue line thats supposed to be the constant vaccum on my year. IDK if it's the blue line or not, but how many "full time" vacuum lines could there be? More than one wouldn't make any sense.
	[Reply w/Quote]

08-20-2008, 02:54 PM	#7
southpaw2_4 Registered User Age: 27 Join Date: Feb 2007 Posts: 183 Location: Surrey, BC User is: OffLine	Re: Vaccum Problem oh well i ordered a new unit and hopefully that solves the problem
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