I had these issues when I first set mine up a few years ago.

The block of ice issue was solved by putting a small pc fan inside the cabinet to circulate the air a bit.

The foamy pours stopped when i added a tower cooler which keeps the beer line in the tower cold all the way to the shank.

The beer inside chest might be 38 but by the time it hits your glass it is probably closer to 42. Too much of a difference in temp and the co2 breaks out into foam.

I have since had to replace my kegerator and bought a commercial perlick model that comes standard with these features and they work like a charm.

Good luck!

Most craft beers have published recommended temp and pressure for serving. You could also call and ask.

When you make temp changes you usually will need a pressure change as well.

I never had much luck under 10psi - keg usually will go flat quicker. Most seem to run fine in the 10-13 psi range.

Airflow inside and getting that faucet temp as close to the inside temp is critical.

Pour a beer and stick a temp probe in it, I’m going to bet you have a 3-5 degree temp difference from what your reading inside .which is huge and causing co2 instability.

Check out micromatic.com they ship pretty quick.