Question about 2006 Buick LaCrosse

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2007 BUICK LACROSSE NO HEAT

HEATER BLOWING COLD AIR

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How difficult is it to access the control valve? I didn't find it under the hood so I am assuming it will be under the dash. The fan is working good, and the car is coming up to temperature beautiful.

Posted on Nov 01, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: heater blowing cold air Buick Century 2000

does the car not heat up in general? Whats the temp gauge doing and how long of a ride have you tried this for?

Posted on Jan 06, 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"

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

  • 1 Answer

SOURCE: Blowing cold air ,no heat

Not exactly certain, but sounds like you have a broken "blend door" or acuator malfunction

Posted on Dec 09, 2009

  • 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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3 Answers

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