Question about 2004 GMC Envoy

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My heater/air blower is not blowing any air, it used to work on 3, 4, 5, but now nothing

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  • GMC Master
  • 1,311 Answers

Two possibilities, bad blower motor or a defective HVAC module.

Posted on Dec 16, 2012

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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OLDERQT
  • 1 Answer

SOURCE: 93 gmc sierra heater not working

THERMOSTAT REPLACE IF NOT SEE IF HOSES ARE CLOGGED SHOT OF AIR COULD HELP OR DISSCONNECT BATTERY CABLE 10-15 MIN CONNECT BACK TRY HEATER

Posted on Jan 04, 2009

aaangie220
  • 202 Answers

SOURCE: Heater blower

Sounds like the blower motor resistor is bad. These things go bad all the time. and for the switching modes there is a vacuum line that runs under the window in the engine compartment and runs by the alternator, its tiny and may take a few minutes to find. check first by the evaporator case and follow it by the alternator to the driverside of the throttle body. these too break and will not allow the heater mode changes. the blower motor resistor controls the fan speeds and the vacuum line allows which vent the air flow goes through.

Posted on Feb 09, 2009

richard3707
  • 70 Answers

SOURCE: air blower

Wires to blower may be crossed or blower resister is bad.

Posted on Apr 18, 2010

  • 9 Answers

SOURCE: 2005 GMC Sierra heater blowers work fine but only

check the coolant level in radiator. if its low it will only circulate while driving, and not while idling. May also be a bad water pump. See a professional for that.

Posted on Nov 08, 2010

luke_bradfor
  • 662 Answers

SOURCE: when i get in my

Because the Main Gear in the Blend Motor has cracked or teeth have chipped and is now not keeping the heat/cold door to the Hot position. 3 fixes: Buy a new Blend motor, takes about 5mins to replace. Buy a new Blend Motor Gear, will take about 30mins to fix. Repair current gear with Epoxy, takes about 30mins and 12hrs for the glue to set up strong enough to use it.

Posted on Feb 24, 2011

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1 Answer

I have a 2003 Saturn L200 2.2L Manual Drive and the heater or AC will not work no air blowing.


There is a relay that powers the blower motor circuit . Left I/P fuse box , do you know where that is ? The relay is IGN 3 relay .
Fuse Block- I/P - Left
LF of the passenger compartment, behind the kick panel
IGN 3 RELAY
--
IGN3, HVAC CNTRL MODULE
IGN 3
10A
HVAC CNTRL MODULE, TC SW., HTD SEAT SW.
Does your car have Manual or automatic climate control ?

Oct 23, 2016 | 2003 Saturn L-Series

1 Answer

Heat defrost nothing is working and burnt smell 1990 chevy caprice


if you mean no air is blowing,i'd say your blower motors cooked or heater panel blower switch/or blower resistor may have melted

Nov 22, 2013 | 1990 Chevrolet Caprice

1 Answer

Heat will not come out even when it says it's on


Here some solutions:
Q: Turn it on but no air come out like use to ?
A: Check the (heater) fuse. It could blow out ( Burn).
Q: All fuses are good but the blower motor still no blow..?
A: The blower's wire is burn or the blower itself is bad.
Q: Every thing work but just No Heat ?
A: Make sure coolant (water) is full.
Q: Coolant/Water is full but still No Heat ?
A: Heater hose is restrick (Clog)

Mai lor

Feb 22, 2013 | Land Rover Discovery Cars & Trucks

1 Answer

Heater doesnt work


To troubleshoot this types of problem,click the link below :---
Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html

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Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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No heat on car? http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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Heater blows intermittently and temp gauge goes erratic?

http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html

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Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heater/AC blower motor not working?

http://technoanswers.blogspot.in/2012/02/heaterac-blower-motor-not-working-on.html

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A/C, heater, defroster fan, not working? http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html Heater problem?

http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html

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This will help.Thanks.

Mar 27, 2012 | 1994 Volvo 960

1 Answer

Heater motor


Does it still blow air out of the vents? Or is it blowing cold air? If nothing is blowing out most likly just a blower motor try tapping it some its under glove box.If blowing cold air could be low on coolant needs to be press tested.

Jan 17, 2012 | 1998 Dodge Caravan

1 Answer

OUR 04 TRAILBLAZER, THE A/C STOPPED WORKING, IT WOULD WORK SOMETIMES AND BLOW COLD AIR NOW NOTHING COMES OUT, OR THE HEATER TOO.. LITTLE AIR WILL PULL THROUGH IF ON THE HIGHWAY, I CAN HEAR IT CLICK OVER...


a couple of things,1 blower motor fuse.2 blower motor gone out.3 switch on fan speed control switch not sending signal to fans.after checking the fuses.next check theswitch on control panel.set ac or heater.if fan still doesnt come on then replace it.when it work and then stops working there are a lot of possiblities that caused the prob relay too not fliping over inside staying close loop.hope this helps.

Aug 16, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

Heater blower is not working in 1, 2, 3 and fan


MY 2003 MALIBU AC WORK VERY COOL FOR ABOUT ONE HOUR AND THEN TURN A BIT HOT AND THEN NO AIR COME OUT WHY I HAVE CHECK THE FREON AND ITS OK .

Nov 22, 2009 | 2003 Chevrolet Malibu

2 Answers

2005 Dodge Dakota AC and Heater both dead but the blower works!


I would suggest changing the control head. You should be able to source a used unit from a local salvage yard.

Apr 28, 2017 | 2005 Dodge Dakota

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