Question about 2006 Buick LaCrosse CX

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06' buick la crosse only blows cold air when it is set to 90*

Put heat on max, only get cold air

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  • 49 Answers

Probably the thermostat

Posted on Mar 28, 2014

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Posted on Jan 02, 2017

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bozcro
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SOURCE: 2000 Buick LeSabre heater only blows cold

the climate control thermostat is not opening the valve to let the warm coolant in

Posted on Nov 29, 2009

  • 4 Answers

SOURCE: automobile air conditioning on max cool, blows hot

I had the same problem when i was working on my 1999 Buick Regal and had to disconnect the battery. I didn't reconnect in the same way that I disconnected the battery from the terminal and noticed that the driver side had no heat or air but the passenger side did. I then disconnected the battery again and reconnected it the same way and now have heat and air on both the driver and passenger side. Hope this helps. Good Luck!

Posted on Apr 26, 2009

  • 108 Answers

SOURCE: blowing cold air via the heater

Assuming that none of the Electrical/Electronic controls were disturbed when changing the Thermostat it seems to me that you have an "Air Lock" within the heater. One must purge all the air out of the cooling system as close to the highest point as possible after the system has been partially or fully drained. Most of the time one will find small BRASS Bleeder Valves located somewhere near the highest point. Open each one while the system is pressurized and let Air escape until some Coolant escapes. Sometimes it may be necessary to loosen a Heater Hose and bleed the air at that point. Remember that the system MUST BE PRESSURIZED to accomplish the Bleeding of Air. Many auto parts stores sell hand pumps with a pressure gauge for this purpose and leak testing. These pumps typically replace the Radiator Pressure Cap temporarily. The system does not have to be at normal operating temperature to bleed the air out. Once the Air has been bled you will have to refill the radiator to normal full and make sure that the Coolant Recovery Tank level is also brought up to recommended level. A quick check is to remove the Radiator Pressure Cap, Start the Engine, Rev the engine suddenly (A short Jab) and see if the coolant level falls rapidly in the radiator. If it does it is definitely an AIR LOCK situation.

Fastest Robe

Posted on Nov 19, 2009

Testimonial: "Thank you, I'll do the quick jab test to determine the air lock and proceed with bleeding"

  • 1 Answer

SOURCE: 99 Buick Regal LS dual climate control. No heat passenger side.

the motor for the passenger side
blend door is shot

Posted on Jan 12, 2010

  • 12 Answers

SOURCE: 1997 buick lesabre HEATER PROBLEMS The fan

This could be several things. First I would check that the thermostat is not stuck open. This will condition will make the car run cold when it is cold outside.

If this is not the case........and I'm assuming you've already checked that the antifreeze is full, make sure that the heater valve is working. If it is frozen in place then it won't move and won't allow the warm water to circulate through the heater core.

I'm basing my answers on a standard Lesabre. Yours may not have the standard climate control.

Posted on Feb 15, 2010

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Blows cold air turn heat on


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When you put the a/c on in my 2008 ranger it blows hot! and if I put it on max a/c it blows cold why?


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When I put the heat on the drivers side blows warm air but the other side blows cold air


you may have dual heat controls, one for the driver and one for the passenger . my 98 La Sabre had them.

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I have a 1998 Buick Park Avenue when I turn the heat up to 90 it will blow hot air out on both sides of the car when I turn it down to 80 it blows hot air out of the passanger side and cold air out of the...


i just bought a 98 park ave and i had the iossue of hot on passenger side and cold out the driv ers i was told i had to replace the control head and both accuators...... i did a trani flush and it fixe my problem

Jan 06, 2012 | 1998 Buick Park Avenue

1 Answer

The heater blows mostly cool to cold air when the heat is set at 90 degrees. Coolant has been flushed and thermostat replaced


You probably created an air bubble, lock in heater core or the hoses that brings hot water to it when the coolant was replaced, you need to flush the system by loosening the heater hose at the highest point while the engine is running and is up to temperature.

Jan 13, 2010 | 1996 Buick Park Avenue

1 Answer

No heat unless set at max temp. setting.


Hey Summers,, Are you running the A/C with the temperature set at max heat?? If yes. STOP... the A/C is for COLD air..As far as the fan speeds not working....you may have a fan switch that is going bad..(my vehicle is doing this!)..

Jun 16, 2017 | 1999 Oldsmobile Bravada

1 Answer

Automobile air conditioning on max cool, blows hot air on passenger side tried dual climate control settings still cold on driver hot on passenger


I had the same problem when i was working on my 1999 Buick Regal and had to disconnect the battery. I didn't reconnect in the same way that I disconnected the battery from the terminal and noticed that the driver side had no heat or air but the passenger side did. I then disconnected the battery again and reconnected it the same way and now have heat and air on both the driver and passenger side. Hope this helps. Good Luck!

Apr 14, 2009 | 1998 Buick Regal

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Temperature Control not working on 1999 Ford Explorer


Sounds like your temperature actuator is not moving or your temp door is broken. On max a-c ,coolant is shut off to your heater core allowing only cold air in.

Jan 16, 2009 | 1999 Ford Explorer

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Heating system


it is the control module u set for heat/ac in the center of the dash, all the electronics are in side this module that do the switching and maintain the temp u set

Jan 12, 2009 | 1996 Buick Roadmaster

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2002 Lincoln Navigator. Heater is not working, it blows cold air. I had the thermostat changed and it stills blows cold air. There is no water leaks under the dashboard. It takes about 10-15 min for...


try changing the thermostat if thats not it check and see if you have water leaking in the passenger side floor board if so then you need a new heater core

Jan 05, 2009 | 1999 Lincoln Navigator

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