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BOBBYSS
BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 17143
Experience:  ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH
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I hook my AC guages to the unit and I am reading 70 psi on

Customer Question

I hook my AC guages to the unit and I am reading 70 psi on the low side and 50 psi on the high side. New expanion valve , new compressor
Submitted: 1 year ago.
Category: Chevy
Expert:  Gary replied 1 year ago.

what model is this ?

engine size ?

Customer: replied 1 year ago.
1996 Chevrolet
5.7 I think. It is the big engine because it is an RV
Expert:  Gary replied 1 year ago.

let us get you over to the RV guys

hang on another expert will reply back to you

Customer: replied 1 year ago.
Okay
Customer: replied 1 year ago.
No one has responed. It is a chevrolet chassic
Expert:  BOBBYSS replied 1 year ago.

Hello, my name is Bobby. Thank you for the question. Most of the time when you get readings like this it is because there is a restriction in the condenser. Do you have an infrared thermometern to check some things out?

Customer: replied 1 year ago.
I have a infrared thermometer
Expert:  BOBBYSS replied 1 year ago.

Here is what I need. With the a/c system running I need to know the line temperature leaving the compressor, the temp entering the condenser, the temp leaving the condenser, the temp entering the metering tube and the temp leaving it. This will guide me as to where we need to go.

Customer: replied 1 year ago.
Leaving compressor 100.02.
Entering condenser 110
Leaving condenser 82
Entering expansion valve 65.3
Leaving expansion valve 82.5
Expert:  BOBBYSS replied 1 year ago.

First off the high side is not getting hot enough. It may be low or the compressor may be defective. The temperatures at the condenser seem to change correctly but the expansion valve is odd. It reads like it is installed backwards.