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Discussion Starter #1
My 03 Lexus is300 ac keeps going off and I don’t know what’s causing it. Everything I drive I put the Ac on low it’s okay but just when I put it up a little bit the ac blows out hot air. If you anyone knows the problem please let me know
 

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Check your air blend servo. To make sure it is going all the way cold or hot. Next check your pressure levels.
 

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2002 Lexus IS300
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I’d check the Freon level. Since it’s cold while on low the blend door must be already in it’s proper position.
 
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