1995 GMC JIMMY AC AIR FLOW PROBLEMS.

AC AIR FLOWS THROUGH DEFROST VENTS ONLY

1 Answer

Stephen

GMC Master 21,873 Answers
Posted on Jul 07, 2012

Stephen

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Joined: Jun 22, 2012

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Usually a blend door problem.
The system is designed to default to the defrost position for safety.
If the blend doors are vac operated, look for a vac leak.
If electric, look for a failed motor or stuck door.

5 Related Answers

Anonymous

Posted on Aug 25, 2008

SOURCE: Air Vents 2003 Envoy

I have the same ploblem, I just wonder why this is not a recall yet? the other problem i got is the fuel gauge not working.

Anonymous

9 Answers
Posted on Dec 12, 2008

SOURCE: 2001 gmc jimmy engine warm but heater blows cold air

Disconnect the heater hoses from the water pump and the intake manifold. Get a compressor and blow out the hose (put the air hose into the the hose that came off the mainfold. then flush the system and replace the antifreeze.

Anonymous

4669 Answers
Posted on Mar 12, 2009

SOURCE: 2004 GMC Envoy; Very little air flow from FRONT PANEL

Try replacing the cabin air filter.

Anonymous

322 Answers
Posted on Jul 21, 2009

SOURCE: GMC 2003 truck heater/ac not consistent.

check for any vacumm hose leaks that comes from the engine to the ac box, check for vacumm actuator proper operation.

Hector L. Morales

649 Answers
Posted on Aug 02, 2009

SOURCE: 2000 GMC van, ac stopped coming out the front

check vac hoses by firewall iin engine compartment. If disconnected reconnect.

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Vents won't blow hot or cold air. Comes from defrost and feet when you put fan on.

It's the vent actuator, it moves the baffle that changes the direction of the air flow.
Here is a video of a broken vacuum hose that creates the same problem.

It could also be a failed actuator.

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