No A/C through upper vents...comes out the defroster

Asked by camptig Jul 30, 2011 at 07:23 PM about the 2000 Chevrolet Blazer LS 4-Door RWD

Question type: Maintenance & Repair

A/C is not coming through my vents...comes out the defroster.  Can someone please help as to what the problem might be?  Thank you!

2 Answers
5,735

Tom answered 13 years ago

could be a bad mode door actualor

2 people found this helpful.
Mark helpful

papa answered 13 years ago

check the vaclines under hood at firewall for splits,cracks,softness in lines,the vents are vac controlled and if 1 vac line is bad it will just work on defrose,their is also a check valve in same place that 3 vac lines hook to,is round,replace that,can get at any auto store in the help section.

3 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • No A/C through upper vents...comes out the defroster 2 Answers

    A/C is not coming through my vents...comes out the defroster. Can someone please help as to what the problem might be? Thank you!

    2000 Chevrolet Blazer LS 4-Door RWD

    -

    Maintenance & Repair

  • heat only comes out the vents when i drive 1 Answer

    put new antifreez in. No blowing heat when idle small amount comes out only when I drive. What do i need to fix?

    2001 Chevrolet Blazer LT 4-Door 4WD

    -

    Maintenance & Repair

  • no hot air coming out heater vents 10 Answers

    A new radiator, new thermostat, checked all fuses, flushed heater core, checked hoses, still no heat, just blows cold air. What else can I look for? Also found a glass fuse on the floor front passen...

    2002 Chevrolet Blazer LS 2-Door 4WD

    -

    Maintenance & Repair

  • When temp control fan is off, or on, there is hot air blowing through the floor vents, can I fix it cheaply? 1 Answer

    On my 04 Blazer, whether the fan is off or on, and no matter what setting, floor, floor and panel, or dash....there is hot air blowing through the floor vent. Even if the A/C is on, it's a mix of col...

    2004 Chevrolet Blazer LS 4-Door 4WD

    -

    Maintenance & Repair

  • Bolt that comes through top of wheel well 3 Answers

    Hi, I have a 2000 Chevy Blazer 4x4 and noticed my tires were leaking from the rim on drivers side. Well first let me say I'm a female who's dad got on me to always inspect my vehicle. So as I was d...

    2000 Chevrolet Blazer LT 4-Door 4WD

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet Blazer Questions

CarGurus Experts

  • #1
    Andrew Olsen
    Reputation
    4,270
  • #2
    Rowefast
    Reputation
    3,560
  • #3
    yetilikesbeer
    Reputation
    2,420
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Tahoe
15 Great Deals out of 853 listings starting at $5,995
Used Toyota RAV4
88 Great Deals out of 2,086 listings starting at $3,888
Used Jeep Grand Cherokee
135 Great Deals out of 3,222 listings starting at $4,995
Used Chevrolet Silverado 1500
222 Great Deals out of 5,891 listings starting at $2,975
Used Ford Explorer
72 Great Deals out of 2,080 listings starting at $2,999
Used Honda CR-V
112 Great Deals out of 3,880 listings starting at $1,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.