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Heater not working properly 2008 buick lacrosse

Think the blend door is not working properly. air conditioning works great, heater works sometimes but most of the time only blows luke warm air, temperature gauge reads normal

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: 2005 buick lacrosse heater doesn't get warm. no

Go to this link on youtube. It worked for me.

Posted on Jan 29, 2011

  • 237 Answers

SOURCE: air conditioning blowing hot on 2002 buick lesabre ltd

Could be a number of possibilities. However, the most likely is loss of freon. The O-ring seals at a number of line connections tend to leak over time. There are other mechanical and electrical possibilities but you should first have someone check the freon charge with a set of gauges to measure the pressures. It might cost you a bit to have it tested but the pressure reading will tell you a LOT of things. In the long run it will save you money over guess-work.

Posted on Jun 24, 2009

  • 37 Answers

SOURCE: I have a 2005 Buick LaSabre. When I turn the


Posted on Nov 29, 2009

  • 867 Answers

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

  • 3113 Answers

SOURCE: No Heat in my 1994 Buick Roadmaster sedan blower

The heater core may be stopped up. Try to back flush it with a water hose.

Posted on Dec 07, 2009

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2 Answers

2008 Buick LaCrosse blows cold air, changed thermostat no change

Might have a bad actuator, which open the access port for warm coolant to enter the heater core.

Nov 29, 2016 | Buick Cars & Trucks

1 Answer

The A/C pump starts when i move heater controls to defrost or mix

Great question dustin but the A/C is suppose to come on in defrost or mix mode- this is floor & defrost. Does not seem to make sense does it. One of the things the a/c does is remove the moisture from the air. You need warm DRY air to remove the moisture from the windows. An automotive H.V.A.C. ( Heating,Ventilation,Air conditioning) first forces air thru the a/c evaporator core then thru the heater core and out the selected vent. If you only want a/c a blend door will by-pass the heater core which is controlled by a hot/cold knob or digital temp cotrol on the dash. Now back to the cold air problem- assuming the basics are all ok- Coolant is full, Engine gets up to proper operating temp-around 195 degrees- upper radiator should be hot. Both heater hoses should be hot. If thats all OK the blend door might not be working. It is controlled by an electric motor called a Blend Door Actuator which are prone to fail. I have replaced many on ford vehicles. Hope this helps

Nov 26, 2013 | 2006 Ford F-250 Super Duty

1 Answer

Heater lows cold air not heat

Blend door actuator stuck or vaccume came dissconected. Could also be low on coolant

Nov 25, 2013 | 2005 Buick LaCrosse

1 Answer

2006 buick lacrosse heater is not working

I strongly recommend you take it back to the dealer and ask for help.
If it is something they damaged, and you have another shop repair it, the dealer is then off the hook for responsibility.
The problem could be a blend door under the dash, or the heater core may not be getting proper coolant flow.

Jan 21, 2013 | 2006 Buick LaCrosse

1 Answer

The fan works, air conditioning works, but the air wont heat up(knob turns to hot on thermostat). is it a vacuum hose problem, and how do we get to it?

The most common cause of this in the Ranger and the Explorer is that a part called the air temeperature control blend door acuator or the blend door shaft that the electric actuator moves has broken, this door is what shuttles between the heater core and the AC core and provides either heated or cooled air, or a blend of the two hot and cold air streams.

Dec 26, 2010 | 2008 Ford Ranger 2WD

1 Answer

Hearter isn't heating up

There is so many reasons for not getting heat. Is the Antifreeze full? Does it have climate control? The air blend doors have to be checked and make sure there working properly. It is possiable the engine have a blown head gasket and creating an air pocket. Out of all the posabilities the engine Thermostat is the most comon problem.

Dec 21, 2010 | 2005 Buick LaCrosse

2 Answers

2003 buick lesabre AC problem

You have to find the motor that controls the blend door and open it manually to find out which one is bad there are 3 blend doors on the HV/AC system one will be where the heater core is. The other will be between the vented air and AC? heating system then the third door will operate vents in dash and defrost condition. If you have someone operate them AC system heating system and watch the blend door motors, the one you find not moving will be the one that has the problem. They have vacuum and electrical motors, if it is a acuum motor you can move the door manually with your hand, if it's electric you will have to disconnect the rod by removing the pinch clip off of the rod.

Jul 10, 2009 | 2003 Buick LeSabre

1 Answer

yes it is called the blend door, you either have a sticking blend door or the actuator motor for the door is defective and does not completely shut off the heater core. The pass side has it's own blend door.

Feb 03, 2009 | 1997 Buick LeSabre

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