My brothers air had not been working for some time. I decided to fix it for him. Installed new compresser, all new o rings and flushed the evaporator all lines and the condenser. Charge sticker said 1.12 oz. Using my home scale I got 1.2. Replaced dryer. However did not replace orfice tube as it is in the line and there is no way to replace it without replacing the whole line and no one had it in stock llocally and my brother needed to be abel to drive it to work.
I put 8 oz of oil in the system.
It now cools marginally. Using my harbor freight guages I am reading 70-75 on the low side and 300-350 on the high at 1500 rpm. Outside temp was 90. Would could the problem be?
I appreciate it!
High low side and high high side usually means you have compressible gases in the system-- like nitrogen, oxygen etc--(air). Or you could have gases left over from your flushing agent-- how do you know you got all the flushing agent out? I never put anything in an a/c system that I don't want in there. The touble with flushing agents is you never know if there is still some remaining in the system. You can blow through it until the cows come home-- and you can still smell it when you pull a vacuum.....so why did you decide to flush anyway?
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
Hopefully you did not try to flush thru the line with the orfice tube in it. Never flush a metering device or compressor.
I do flush systems but use the pulsator by Hecat with a good flush solvent. I am really a stickler for making sure all the solvent exits the system. I also use N2 to dry my components.
Did you pull a vacuum before charging?
What was wrong with the original compressor? If it had seized up the condenser and orifice are likely full of debris.
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