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1999 Chevy Truck a/c not cooling properly

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Posted at Fri Jun 27, 2008 4:01 pm
By dwsmith43, Likes cars!
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Air Conditioning problem
1999 Chevy Truck V8 Two Wheel Drive Automatic 130,00 miles
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my a/c does not cool at all when idleing. it cools some what at low speed. baffling part is that it cools perfect at highway speed. engine normal temp. no bugs or obstructions on evaporater.
 
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Posted at Fri Jun 27, 2008 4:01 pm
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Posted at Fri Jun 27, 2008 4:06 pm
By mastertechtim, Tech level 9
Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2 (282) Give Feedback | Votes: 19
   
not baffling at all mr smith. replace your cooling fan clutch assembly and all your ac problems will be gone
 
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Posted at Fri Jun 27, 2008 7:23 pm
By dwsmith43, Likes cars!
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after you replied i went out and sprayed water on evap while it was running and sure enough it cooled like a dream. thanks for your help. next is a fuel pump thing, on my third in 18 months. "next payday"
 
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Posted at Sat Jun 28, 2008 3:24 am
By mastertechtim, Tech level 9
Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2Reputation: 282.2 (282) Give Feedback | Votes: 19
   
cool
 
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Posted at Sun Jun 29, 2008 4:53 pm
By dwsmith43, Likes cars!
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took advise from this site day before yesterday and changed out my fan clutch assy. should i check the pressures. i bought the adapter to use my 134A guages from work. what pressures am i looking for. engine runs cooler though. so it wasn't a waste.
 
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Posted at Mon Jun 30, 2008 4:31 pm
By mastertechtim, Tech level 9
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30 psi on low side and about 150 to 200 on high side. still cools fine at high speeds but not at idle. let me know ab out those pressures.
 
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