heater only works sometimes?

1996 BUICK LESABRE
100,000 MILES
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MICHELLENELSON
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  • 5 POSTS
the fan for heater always works but the heat that comes out is only there once in a while...was working all the time?
Jan 22, 2012 at 7:14 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Are you saying, the blower motor always works ok, but, no air from vents? You may have to check actuators under the dash. This guide will help with diagrams below

https://www.2carpros.com/articles/car-heater-not-working

Check out the diagrams (Below). Please let us know what happens.
Mar 22, 2021 at 12:57 PM
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MICHELLENELSON
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  • 5 POSTS
when you turn it on air comes out..but now most of the time it is cold air instead of hot
Mar 22, 2021 at 12:57 PM
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RASMATAZ
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Check the air blend door/actuator could be stuck in the cold position
Mar 22, 2021 at 12:57 PM
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MICHELLENELSON
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Ok can you tell me where that is please and I will go do it...lol its 15 degrees here
Mar 22, 2021 at 12:57 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
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If your heater hoses don't get hot, you fighting a losing battle, with extreme cold.
Mar 22, 2021 at 12:57 PM
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MICHELLENELSON
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Ok we will check the hoses and see if they are hot..my husband says sometimes it starts out hot air for a few seconds then it just goes cold and sometimes it just heats right up..will check the hoses thank you
Mar 22, 2021 at 12:57 PM
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RASMATAZ
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Have you replaced the thermostat? this is the one that controls the temperature
Mar 22, 2021 at 12:57 PM
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MICHELLENELSON
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yes thermostat and today water pump
Mar 22, 2021 at 12:57 PM
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