12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

a/c hoses

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Old Nov 24, 2011 | 03:00 PM
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Billy D's Avatar
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Default a/c hoses

My a/c lines are freezing. It's 50 in Ohio, I haven't used my a/c fer over a month. It's like the compressor is kicking on, but I'm using the heater now. It all thaws off after I shut the truck off, but somethings wrong. What can it be Any info is greatly appreciated

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Last edited by Billy D; Nov 24, 2011 at 03:00 PM. Reason: Automerged Doublepost
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Old Nov 24, 2011 | 03:33 PM
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The A/C with cut in on defrost mode..

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Should read WILL cut in on defrost mode..
 

Last edited by Dallas Flywheels; Nov 24, 2011 at 03:33 PM. Reason: Automerged Doublepost
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Old Nov 24, 2011 | 08:10 PM
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The lines freeze if the heats on or not, defrost, heater, vent, I do have heat. Also i can feel my Evap inside the cab, under the dash, its very cold. It's not supposed to be like that right
 
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Old Nov 25, 2011 | 09:46 AM
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You say it is like the compressor is kicking in, Have you checked to see if it is running when it should not be? Maybe A/C relay is stuck. Pull electrical plug off compressor and run.
 
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Old Nov 26, 2011 | 10:08 AM
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Originally Posted by Dallas Flywheels
The A/C with cut in on defrost mode..

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Should read WILL cut in on defrost mode..
Why does this happen? Is there something I can do, or just unplug it as said

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Can I just pull the relay, or the fuse instead of unplugging the compressor
 

Last edited by Billy D; Nov 26, 2011 at 10:08 AM. Reason: Automerged Doublepost
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