Question about 2003 GMC Envoy

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2003 envoy ac blows cold from defrost and floor but will not dash

Just had the thermostat, coolant and serpentine belt replaced. Now the AC will not switch between the floor, defrost, and dash vents.

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  • fractal815 Jun 27, 2009

    Thanks for your input walli321 but it appears that the dampers are operated electronicly. At least I don't see any vacuum tubing or motors, just wires.....

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U have to take your dashboard at the glove compartment to cheack the vacuumpod ot your damper door

Posted on Jun 27, 2009

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1 Answer

Why does My thermostat Not switch between ac,heat,defrost . there's cold air coming out of vents but not cold enough to be ac. Initially when this started the ac was blowing hot air


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NO HEAT ON FLOOR VENTS

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As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html


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No heat on Oldsmobile Silhouette?


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

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

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

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http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

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http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

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http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

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http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

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Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

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2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html

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2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

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These will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

I have a 2003 GMC Envoy. AC blowing cold, just not out front vents


Yep, when you put the new battery in, it blew your actuators, PIA job, but can be done. You can TRY disconnecting battery again, but I'm betting your actuators just blew. Very common problem with our platform, poor design.

May 17, 2017 | 2003 GMC Envoy

1 Answer

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1 Answer

I can turn the ac off and turn the heat on in my 1998 Mercury Grand Marquis. How do I control the thermostat? I have tried putting on auto,vent,floor/defrost,defrost, and turned the temp up to 90 and it...


It sounds like thermostat (in coolant system) needs to be replaced. They only control you have for temps are the dials on dash, but if coolant thermostat is sticking you're limited to what it outputs. Replace coolant thermostat and you should be "good to go"

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2 Answers

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1 Answer

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1 Answer

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1 Answer

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