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Old Oct 25, 2010 | 05:41 PM
  #1  
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Air Conditioner Compressor

is the a/c compressor supposed to be engaged in all mode settings except panel, off and feet... regardless of the temperature control **** setting?

air gap=0.020 in panel, off and feet mode. otherwise, it is always engaged if the ignition is on or the truck is running.

both pins and plug connections at a/c compressor housing look like new. A/C blows cold air just fine. thanks- Cole
 
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Old Oct 25, 2010 | 07:42 PM
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I believe that is correct. There's only a couple of settings the compressor stays off.
 
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Old Oct 25, 2010 | 07:59 PM
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sooo...

let me get this straight... the a/c compressor is engaged and pumping fluid even when (for example) the mode selection is defrost and the temp control setting is set to high heat. (as long as the ambient outside air temp is greater than 43*F, IAW owners man).

What a primitive design then. I thought A/C technology had advanced further than that by '02. But I must be wrong. thanks-
 
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Old Oct 25, 2010 | 08:50 PM
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It runs to help control humidity. I remember the days when you turned the vent to blow on the windshield in the winter, but also turned on the AC so the heat didn't fog up the window.
 
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Old Oct 25, 2010 | 09:48 PM
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most AC systems run that way, the AC is used to control the humidity...I had to run around for a year w/o ac in my truck and it was almost impossible to keep the windows clear with 2 adults and 3 kids in the cab.
 
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Old Oct 25, 2010 | 09:52 PM
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As stated the ac evaporator acts as a de-humidifer to pull moisture out of the air to help keep the windows clear.
 
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Old Oct 25, 2010 | 10:02 PM
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...and yes, that's correct. Off in all modes except feet only, off, and panel vent.
 
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Old Oct 26, 2010 | 06:59 AM
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Izzy

I assume you mean OFF only in panel, off and feet mode! otherwise, compressor is "ON"?????? As opposed to "except in".

How did I ever get by all those decades without A/C to help me clear my windows. Life was tough back then.

No wonder they quit working so soon, they run all the time whether you need 'em or not. I'll have to remember to leave it in "panel" mode to get nice cool dry un-A/C air, like today. Not bitchin', just adapting. Hard for old goats {];-/>

thanks for the replies!
 

Last edited by knuckleheadnut; Oct 26, 2010 at 07:06 AM. Reason: typos
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Old Oct 26, 2010 | 07:31 AM
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When it starts to get cool in the fall, I unplug mine at the compressor. On most vehicles in the past, I have put a switch under the dash to turn it off.
 
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Old Oct 26, 2010 | 12:09 PM
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Mark- pulling the switch at the compressor sounds like a great idea. I just can't see running the comp when it's not needed. That way I'll save it for when I retire down south (some day, I hope) and it'll be running all the time.
 
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