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1996 suburban defroster don"t blow air

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  • Expert
  • 274 Answers

Check under your dash to see if the plastic piece came disconnected or if something is blocking it

Posted on Jan 16, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

CDNMoose
  • 15 Answers

SOURCE: 1996 GMC Suburban heater blows on floor

yes those controls are vacuum controlle. Could be as simple as a bad hose or connection.

Posted on Feb 19, 2009

tepfy
  • 319 Answers

SOURCE: air conditioning blows out defrost when accelerator is depressed

You need to open the vent, under the dash. Check the cable and moving action assembly. Make sure that it is all moving correctly. Some of the newer hvac systems in cars work off of vacume but most work with cables. Not big long cables, just small lever cables. also check your seals and make sure none of them are broken. I often find this is a bigger probel, the seal is cracked or broken or just came off and needs to be re glued in place. Don't be afraid to take the vent tubes apart as long as you can remember where they go.

Posted on May 31, 2009

freetek
  • 5568 Answers

SOURCE: Cold Air Not Blowing Through Vents

Your last guess is probably the right one. The deflectors/directors are vacuum controlled and you may have vacuum line either broken or disconnected; these aren't fun to find. I would start under the hood and make sure the vacuum reservoir is intact (have seen them cracked) and then start tracing hoses from there.

Posted on Aug 18, 2009

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morse008
  • 1111 Answers

SOURCE: 1996 chevy blazer my air on heater will not blow

the idea of the switch is run on vacuum and is not making contact with the switch it self either worn contacts in the switch itself **** as an obstruction as well or the vent door is stuck in just that position either behind the glove box or the ash tray are the vacuum lines one of them may be pinched off or the door needs a bit of help until you can free it up

Posted on Sep 08, 2009

  • 179 Answers

SOURCE: air conditioning blowing out of defrost

your vent is not closing usually controlled by vacuum is there a vac hose off under the dash?

Posted on Sep 21, 2009

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1 Answer

1996 GMC Suburban heater blows on floor


yes those controls are vacuum controlle. Could be as simple as a bad hose or connection.

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