[hkstroud]

To dsigala

The post that you ask your question was old (4 years old) and locked. You should not have been able to add to that thread but obviously you were. Because it is locked no one can respond to you.

All of the HVAC experts on this site appear to have left the site. Apparently they made enough money and retired to a south sea island.

I am no expert but have paid around with it a little.
In your post you ask,

can it still be overcharged with 0 psi showing on the low side?

but there is frost on the low side line

Yes. The refrigerant expands depending on temperature and pressure. At 18 degrees in freezer the temperature is not preventing the refrigerant from expanding. Therefore it must be pressure. When unexpanded refrigerant hits low side line and higher temperature is can expand and absorb heat. Therefore the frosting of the low side line . That means all of the refrigerant is no expanding in the evaporator coil.

Release a small amount of refrigerant (in increments) until frost line recedes back into evaporator coil. This should reduce low side pressure temporarily. Low side pressure should return to 0 when freezer reaches 10 degrees.

Zero pressure at 18 degrees is not the same as 0 pressure at 10 degrees.

Remember, I am no expert.

[hkstroud]

Forgive my typos. There appears to be no editing capability when posting a question like there is when responding to one.

paid around with it a little.

Should have read
"played around with it a little"

no expanding in the evaporator

Should have read
"not expanding in the evaporator"

[talaniman]

Just to add the actual post.

WOW! That's awsome that you took the time to help us non professional help with this problem,
I had the same thing happened, Service tech came out and sad I probably had a leak in the condenser or somewhere and
Not worth fixing, paid him 70.00 for his service call! So I installed a Line tap on the low side, connected my manifold gauges, saw it was in the minus side
Don't remember amount, but charged until it settled ina t 0 PSI, but there is frost on the low side line, I used A/C Pro refrigerant 134A, with leak seal
On fellow on DIY forum said it may mess up my gauges, anyway call AC Pro and they said no problem, but my freeszer should get down to -10 deg, and it ony 18 deg, and frost on the low side line, can it still be overcharged with 0 psi showing on the low side?
Thanks
Dennis

From https://www.askmehelpdesk.com/applia...aw-297893.html