New Kegerator - Foam

Hey Everyone, I have read countless thread on this and have not been able to solve my problem. I am getting all foam from my kegerator. I need to balance this for a coors light keg for now (no barbs about the crappy beer please, the home brew is going in afterwards) and I have been changing things based on recommendations from other peoples issues that I have read about, but can't get this solved. Here are the facts:

-Mini-fridge style kegerator with tower and circulating fan to keep tower cool
-Tower goes 2 feet above keg
-Temperature of beer: 34 degrees
-line length: 12feet of 3/16" beer grade line kept in the fridge, above the keg
-pressure: 10psi
-Altitude: ~7500 feet (in Colorado)
-Everything has been cleaned thoroughly
-Brand new CO2 regulator
-Keg was placed in the kegerator for three days to settle, then tapped and vented and sat for another 48 hours

I have tried line lengths from 3ft to 12ft, Pressures from 3psi to 16 psi, and temperatures from 33degrees to 40 degrees. Every time I change something I let the whole system settle. All I ever get is foam, foam, foam. If anyone has any ideas I am more than happy to try pretty much anything at this point as I am thoroughly frustrated. Thanks in advance.

If the lines and faucet are clean and clear of obstruction, then make sure you open and close the faucet fully. If you open it half way, it'll spray foam. You ruled out my other theories, but someone here will know...

^ Good advice.

Otherwise, the only things left are the keg and the coupler. There's at least one o-ring in a Sanke D-type coupler that keeps the CO2 from shunting to the beer out. I think about now I'd take that coupler out of service and give it a full tear down and cleaning...

Cheers!