Question about 2003 Pontiac Aztek

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Pontiac Aztek airflow decreases when temperature dial turned to hot

When the fan is running the amount of air that comes out decreases when the temperature dial is turned from cold to hot. Pulled the lower dash apart. It appears the controls are moving when I change the temp as well as the position for air flow (defrost, heat, vent, etc....)

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  • Pontiac Master
  • 803 Answers

Heater core may be restricted with excessive dust/dirt and debris, not allowing sufficient airflow to pass thru

Posted on Feb 18, 2014

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  • 2 Answers

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Posted on Jan 02, 2017

dgjtex
  • 405 Answers

SOURCE: 2004 Pontiac Montana blows cold air in defrost

There is a mix damper inside your duct that controls the heat over heater core and ac evaporator that to your floor and one to your defrost. it is probable an electric actuator, that is not functioning properly. If yu can locate it and manually move it, you might have to remove the actuator motor first, you should be able to figure out your problem, I hope this helps! merry Christmas!

Posted on Dec 22, 2008

  • 3 Answers

SOURCE: Heater works ok but wont send air thru defrost vents

check the control knob it may appear to be working but is not turning the actual controller

Posted on Jan 01, 2009

  • 83 Answers

SOURCE: Heater only blows thru dashboard vents, won't defrost

chech cable on back of cluster dial some time pops of causing issue.

Posted on Jan 03, 2009

  • 1118 Answers

SOURCE: a/c vents door control not working

Can you hear anything moving in heater when you move the switch to other settings? If not then the blend door is not moving to redirect air flow. There is three things that could cause this, 1 the control switch is bad or 2 the blend door acturator is bad, and 3 linkage for the door has come unhooked or broke, most likely its #1 or #2. First you need to find the blend door acturator and test light the wires to it, there should be 3, 1 hot with key on 2 only hot with switch moved, and 3 ground. If you got power from wires than the acturator motor is bad, if no power switch is bad.

Posted on Feb 04, 2009

Atomicjack
  • 1 Answer

SOURCE: 2005 PONTIAC mONTANA-NO HEAT

Had the same problem with 03 Montana and it was the actuator assemble. It controls the hot and cold air and controls all of the other functions....defrost, floor etc...

Posted on Feb 06, 2009

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1 Answer

Water comes out of cap after I stop


When you stop the engine heat is still being generated inthe engine from all the hot bits. As there is now no water circulation through the radiator these cause local boiling which pushes the watemp right up. The pressure generated by this rise in temperature opens the cap expelling water. I would find the cause of the engine running hot to start with. Faulty fan /fan motor,failed viscous fan hub, thermostat blocked radiator are a few starting points

Jan 13, 2013 | 2004 Pontiac Aztek

1 Answer

My radicator fan is not working causing my temp gague to move alittle to the red. Is this the fuse? I added anti freeze and it still moves to the red. Thanks


Physically look in the radiator under the cap when cool, for coolant level, and check the valve in the cap for sticking. If air is present in the radiator it can't get out, and more coolant can't get in,(from the overflow). Either clean the cap or replace it and check that it is the CORRECT cap.
Radiator fins dirty, clean with a strong stream of water, not high pressure water.
Radiator clogged, have it boiled out, or replace.
Thermostat stuck open or shut, replace it.
Water pump worn out, can no longer move enough coolant, replace it.
Fan shroud broken or missing....
Electric Fan(s) not working, Check the fan, relay, fuse and engine temperature sensor's.
Belt driven fan, belt slipping, fan clutch is bad, fan blades have flattened out.

Air dam under front bumper is gone, loose, or broken. It actually has a purpose other than scraping on the driveway or curbs. It forces air up into and thru the condenser and radiator. If it's loose, airflow can actually push it out of place making it useless or blocking the airflow. Along with that, there may also be a plastic piece attached to the bottom of, and wraps up behind the bumper. If it's loose, airflow can actually push it out of place blocking the airflow. Simply reattach it with 4 or 5 screws.

Also, if the vehicle has A/C and electric fans, one fan is dedicated to the A/C and should come on almost the instant the A/C is turned on. The engine fan will run even with the key off, that is normal. The system is trying to cool itself. Hope this helps.

Aug 24, 2011 | 2003 Pontiac Aztek

1 Answer

Replace water pump, thermostat and temperature sensor on 2004 pontiac aztek still getting hot


have you checked to see if the cooling fan is working properly.if not then it will have to be checked to see if its the fan that is no good,wiring,or a relay.there are 2 temp sensors one for the gage/light and one for the computer to know what the engine temp is to alter engine controls and cooling fan operation.

Jun 14, 2011 | 2004 Pontiac Aztek

1 Answer

The temp gauge is not showing any heat but fan air is warm not hot .changed the temp sensor but still no gauge reading .the cooling fans on the rad are going all the time for about 5 mins even after i stop...


I am having the same problem with my 2001 Aztek. I changed the temperature sensor. It worked for a while and now its doing it again. One mechanic told me it problably needs a new thermostat. I might try that. Will try and report. If you have found a solution please let me know.

May 21, 2010 | 2001 Pontiac Aztek

2 Answers

My heater stoped blowing hot air.antifreeze level


If the blower is blowing air just fine, but you cannot control the temperature, you need to listen to air coming from the vents while turning the temperature from hot to cold. If you do n ot hear any change in airflow, then you may a temperature door in the dash broken. this is becoming a common problem on the Equinox and Pontiac Torrent,

Tech JK
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Oct 13, 2009 | 2006 Chevrolet Equinox

1 Answer

I have similar problem and i was told


check for fans coming on,,fan relay,fan fuse,,coolant sensor,,,bleed coolant system

Jul 05, 2009 | 2002 Pontiac Aztek

1 Answer

2004 pontiac aztek cooling fans not working


relays control fans high and low. does fan come on with a/c on?hot wiring only will create more expensive problems in future!!!!! 2004 not 84

Aug 26, 2008 | 2005 Pontiac Aztek

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