1998 GMC Jimmy Repair Question
Topics covered: Gauges, Mechanic, Accumulator.
Mileage: 125,708 miles.
Mileage: 125,708 miles.
Asked on May 7, 2012
How to confirm if A/C system is discharged of pressure
Hello, I have just recently came back from mechanic and was told I need to replace my compressor because it has "hole" and is "warped". He did a evacuate and recharge to test it. He told me i need to replace drier (I assuming this is the accumulator too), and orifice tube. Along with flushing system. I am able to see the parts to replace and they don't seem hard to take off. I have an empty can of Freon with psi gauge. When I hook it up to low port of system it reads 0 while engine is on and a/c is full blast. Is this reliable indicator to take apart a/c components with out danger?
p.s. it seems the mechanic evacuated, recharged, and evacuated again. :-)
p.s. it seems the mechanic evacuated, recharged, and evacuated again. :-)
Asked by roycar71Answer
Replied on May 7, 2012
You should have both sides of the system checked with the correct A/C manifold gauge, never crack open any lines to check for pressure.
Replied on May 7, 2012
Harbor frieght has gauage manifold with low and high gauges. Could this be something used to confirm presure and once confirmed I could take off components? Thanks.
Replied on May 7, 2012
yes, that will work.
Roy
Replied on May 7, 2012
If there is presure. Can vacuum be used? Thanks again.
Replied on May 7, 2012
there may be a small amount of residual pressure. you can vent that with your gauge set.
Roy
Replied on May 7, 2012
well is that common to have no pressure on low part and some on high port?
Replied on May 7, 2012
ok, I will cost compare amount of gauges vs. going to shop that would do a evacaute. Thanks.
Replied on May 7, 2012
good set is about 100.
Roy