Question about 1994 Buick LeSabre

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Hot air comes out when a/c is on

Had heater core replace and now on hot air comes out when air cond is on.

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  • Buick Master
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Check to ensure that the compressor clutch is engaging when turned on. There are ac wires that may have been disconnected in the core replacement process.

Posted on Dec 29, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: heater core replacement

OK, Ifound the problem with mine. Dont unplug your air dryer. I checked the 2 hoses coming out from the heater core and still one was hot and the other not hot. The top one comes from the radiator fill tank and the bottom one comes out of the core and goes around to the front and into the water pump. I disconnected both close to the core and could runwater through both directions so upon further examination, I disconnected the hose at the water pump and no water flow. The hose was plugged up with something. Once I cleared it with a hanger and reconnected it I had water flowing through the core and great heat. Hope this is your problem too as it is aneasy fix

Posted on Oct 23, 2008

alicantecoli
  • 22095 Answers

SOURCE: cold air all the time

one of you trampillias not working either a thin plastic pipe has come off or computer not working or a control switch so the flap is not opening up allowing the air to blow over the heater core rad .look under bonnet for a valve/solonoid with a pipe in and two or three out,sometimes this packs up which doesnt allow the vacumn through to open the actuators (trampillias)

Posted on Jan 17, 2009

  • 4044 Answers

SOURCE: My heater does not put out hot air, just barely

Low fluid in the radiator, an air bubble in the Cooling system, the control valve not opening correctly due to low vacum or a damaged cable. There are a lot of possible solutions. I recommend you get the Haynes repair manual on your vehicle and check out the troubleshooting section in that manual.

Posted on Jan 02, 2010

  • 474 Answers

SOURCE: 96 Buick Park Avenue, heater wont blow hot air.

Start the car and let it warm up. After it is warmed up open the hood. Look for your top radiator hose, and see if you can squeeze the hose, if the hose is hard to squeeze, the thermastat is stuck shut. If your heater core was out, it would be leaking badly.

Posted on Feb 26, 2011

  • 5370 Answers

SOURCE: heater core is working but car is not blowing hot air

Regarding this types of problem,i suggest you to go through this help links.Click the link below to go through the procedure and troubleshoot the problem :----

HOW TO REPLACE AN UPPER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

-------------
HOW TO REPLACE A LOWER RADIATOR HOSEhttp://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html
----------How to Flush Heater Core?http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html
------------

For heater core replacing procedure. I suggest you to go through this related help links.Its all complete step by step procedure: ----How to replace heater core for All car models?

Click the link below: ---

http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html

--------------
How to Flush Heater Core?

http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html

---------------
How to Remove Heater Core ?

http://howtobyme.blogspot.com/2011/12/how-to-remove-heater-core-on-2008-honda.html
Heater Core Replacement?

http://howtobyme.blogspot.com/2011/12/honda-heater-core-replacement.html

------------
To replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on.html------

How to replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on_10.html
How to replace heater core on Buick Regal?

http://howtobyme.blogspot.in/2012/02/how-to-replace-heater-core-on-buick.html
----------This will help.Thanks.

Posted on Feb 18, 2012

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Could be a few problems causing this. Check to see if both heater hoses are hot going into and coming out of the heater core from under the hood. If both hoses are hot then there is an issue with the blend door/s inside the heater box assembly. If only 1 hose hot at the heater core and the other hose warm/cool you most likely have a heater core restriction and a back flush will be required. If no hoses are hot at the heater core then you have air in the system or the coolant level is low

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