OK, first I'll say I don't know much about A/C function, but do have an idea how it works...
Last Fall I got a new Central A/C system from a guy that owed me money. (His Dad owns a HVAC shop)
The guy since skipped town, but I did manage to get the system installed, but not running 100%.
Electrically, everything works fine. It comes on, goes off as it's supposed to.
The problem is, it doesn't get as cold as it should...
When I had it charged with R22, we used a vacuum pump to suck down the system before opening up the service ports on the outside compressor unit...
After it sat with a 30hg vacuum for 1/2 hour or so, we opened up the service ports assuming it was "pre-charged" from the factory...
Started it up and ran it for a few minutes with a set of guages on it.
The high side was only at 100psi, and the low side was around 30psi. (If I recall correctly)
We decided it was low on R22, or had none at all, so we charged it, and got the pressures up to 300psi high side and 80psi low side...
STILL no cold air...
I did notice that both lines to the evaporator were the same temp, and cold to touch.
Checked them with an IR temp guage and it said they were only @ 72 degrees F...
When I got the unit, it came with a piston kit, which I did not install.
The piston that was "pre-installed" was .059", and the extra piston supplied was .065"...
My buddy that charged the system said he was afraid to use the bigger piston, as it could "flood the evaporator"...
It was getting dark, so we just left it as is, and my buddy went home...
The next day, I went outside, closed the service ports, and changed the piston kit to the bigger .065"...
When I opened the line to install the piston, I got what I thought was an UNUSUAL amount of oil out of the line...
The piston is installed just above 4 capillary tubes, and it just seems like the excessive amount of oil could have been clogging the tubes, or creating a problem some how...
Any Advice ?
I don't feel like calling a contractor, and paying several hundred dollars for 1 hour of work I could do myself.
Thanks in advance.