Question about 1997 Chevrolet Blazer

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Ac wont come thru vent on 97 chevy blazer. ac will come out thru defroster and sometimes the floor vent but it isn't coming out of forward vents

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Check the vac lines for leaks on the drivers side rear of the engine compartment. The ones going to the vac ball attached to the hood.

Posted on Jul 11, 2010

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1 Answer

Does the Erg vacuum solenoid cause the ac switching from vents to defrost


the ERG shouldn't have anything to do with what vents the AC comes out of, rather the dash switch that exists for changing from defrost to main vents to floor vents controls what vents are used.

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Usually a sign the blend door is not working under the dash. The blend doors direct air thru the vents and the heater core.

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I have a 97 chevy k2500 the fan works, heat and ac works, the floor vents and dash vents work but cant get any air to blow out of the defrost vents. help i have replaced the control panel, still have...


Your vehicle uses electronically controlled blend doors to direct th air flow from defrost to vent and to the floor . If the door motor is bad then it will stay at a fixed position so you will not get the air to flow out the defrost ducts. There are at least two of these one for air blend and one for fresh air. They are located on the passenger side usually under the plastic cover and have a wire harness that plug in and are usually shaped like a piece of pie.

Mar 03, 2011 | 1997 Chevrolet K2500

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1992 chevy g20 van ... AC blows through the lower ducts but not the mail cabin vents. What do I look for to fix this?


Behind the dash, when you throw the lever to change which vents you want air to come through, it can sometimes "slip" over little plastic gears/levers which flip the ductwork to different vents such as floor to the dash vents or defrost. look up from under the dash to see if the vent control switch is actually moving anything underthere.

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97 chevy blazer ac only blows thru defroster & floor, nothing comes thru vents, not ac are or outside air, is this hard to fix?


Go to autone get 2 ft of 7/32 and 5/32 vacuum line its like four bucks then open hood on drivers side attached to hood is a black air canister there should be a vacuum line running from it down to a t where two others meet replace hose from engine and to canister ud should be good to go akso vents

Jul 17, 2009 | 1997 Chevrolet Blazer

1 Answer

AC blows through defrost and floor vents instead of ac vents


You have a vacuum leak in the system that controls the vent doors. First check for cracks at the vacuum reservoir, then check the various vacuum hoses and vacuum motors for a leak.
Charlie

Jun 18, 2009 | 1999 Cadillac DeVille

1 Answer

Defroster & floor blowers don't work but front facing vents do


There are what they call mode door's these days they have a electrical motor that turnes the door to different posistions...sounds like yours is become broken. It would depend on your expertise in the ac & heating system area to replace the part. Sometimes easy and most of the times the dash has to be removed.

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Heater control 98 chevy s10 blazer


These trucks have a problem where moisture builds up in the heater box then freezes. When this freezes and you change your heater settings it breaks the shaft for the blend door. If this is what happened you should be able to look under the dash above and to the right of the gas pedal and you will see two vaccuum accuators one of them you should be able to wiggle around the linkage if it is broke. To fix this you need to remove the entire dash to get the heater box out which involves discharging the AC and draining the coolant because the heater core and evaporator come out. Please rate.

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