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chergett Newbie


Joined: May 31 2011
Online Status: Offline Posts: 2
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Location: U.S. - Georgia
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Posted: May 31 2011 at 8:34pm | IP Logged
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My A/C compressor makes a rattling noise. I checked the pressure on the low pressure side and it was at 70 psi. That seems too high but I'm not sure. How do I begin to check the system for clogs/bad valves. Might be helpful to have a diagram of the A/C system.
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frontierguy Senior Member

Master Mechanic
Joined: May 20 2008
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Location: U.S. - Pennsylvania
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Posted: May 31 2011 at 8:37pm | IP Logged
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You need gauges to check hi and lo side pressures.
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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chergett Newbie


Joined: May 31 2011
Online Status: Offline Posts: 2
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Location: U.S. - Georgia
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Posted: May 31 2011 at 8:46pm | IP Logged
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What should the pressures be for each side?
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frontierguy Senior Member

Master Mechanic
Joined: May 20 2008
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Location: U.S. - Pennsylvania
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Posted: Jun 01 2011 at 8:25pm | IP Logged
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at 50-70% relative humidity
68 degrees 100-121 hi 23-28 low
77 116-142 27-35
86 136-166 32-40
95 168-204 40-48
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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