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Ac blowing hot air

System is charged correctly but air compressor does not draw enough.

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: a/c compressor will not come on

Blower motor / relay - I'll think about it a little more. Get back to you

Posted on Jun 24, 2009

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tse22
  • 103 Answers

SOURCE: 1999 323i air con is freezing then becomes hot and humid

sounds like there is not enough r134 coolant in the system and when your slowing down the compressor stops turning. Have someone add some coolant and you should be ok.

Posted on Jul 05, 2009

  • 1071 Answers

SOURCE: 2001 330i AC blows cold air then hot air then cold

climate control unit is bad

Posted on Aug 18, 2009

  • 1071 Answers

SOURCE: Blows hot air , HOT air all the time regardless of temp setting

the climate unit has an internal fault

Posted on Aug 23, 2009

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1 Answer

I have a 2002 pt cruiser that is blowing the ac 10amp fuse repeatedly. I mean within minutes of changing it. Also the ac is only blowing hot air. Can someone please help.


An AC system blowing hot air is usually due to a low freon charge or a non operational AC compressor. If the fuse blows, disconnect the compressor electrical plug and turn on the AC. If the fuse doesn't blow, suspect a compressor problem. If the fuse continues to blow with the compressor disconnected, there is a direct short between the ON/OFF switch and the compressor which can take hours to diagnose

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A mechanic would check the system with a set of pressure gauges. If the compressor is running, the low side would read around 30psi and the high side would be around 250psi. That is how you know if the system is full of freon or not.
You may have to get a professional diagnosis to proceed. If you replace the compressor, the accumulator needs to be replaced and a vac pump is used to pull all of the air out before the freon is added.

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The question is: why isn't the compressor clutch turning

The compressor isn't likely seized,it may leak refrigerant,
but won't be what your asking.

The clutch can be jumped to test that

If okey, then you have to diagnose the entire
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A local garage mechanic says the clutch has stopped working on ac that is why it blows hot air instead of cool says it will cost $900. to fix cause I have to buy the whole ac unit does this sound correct?...


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1. Not enough refrigerant for the AC system
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check for enough charge in a/c system of r134a.
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