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97 chev suburban dual a/c system

arnea on Fri August 01, 2008 11:29 AM User is offline

Year: 1997
Make: chev
Model: suburban
Engine Size: 5.7
Refrigerant Type: R134a
Ambient Temp: 85
Pressure Low: 40
Pressure High: 210
Country of Origin: United States

I had a compressor fail earlier in the summer replaced the compressor and dryer. I flushed the entire system but did not open the rear system and also flushed with nitrogen. Front system struggles when it gets above 88 degrees the rear system blows hot air. I used a white orfice tube. Where should this OT be in this type of system??? Thanks Arne

HECAT on Fri August 01, 2008 4:58 PM User is offline

The O/T is in the line between the condenser and the evaporator, usually after the split that goes to the rear. Didn't we discuss this problem in the "cold in front/warm in rear" post? Did you remove the rear TXV and re-flush?


HECAT: You support the Forum when you consider for your a/c parts.


arnea on Sat August 02, 2008 11:06 AM User is offline

we did discuss this. I just needed to be sure where the OT has to be on a dual system...Thanks Arne

chris142 on Sun August 03, 2008 10:44 AM User is offline

On this truck the orifice tube is near the battery.

arnea on Wed August 06, 2008 10:49 AM User is offline

Should the O/T be white in color???? That is what is in the system.. Cooling struggles above 90 degrees and at 70 degrees it is cold as ice. Thanks Arne

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