[c_matt_crap]

I did all the recommended mods. to my Danby and now I'm getting all foam, and no beer. I added a blower to cool the tower, digital thermostat controller for the temp. and opened up the tower to 3". I usually buy 1/6 kegs but I bought a 1/2 barrel of Sierra Nevada Pale Ale on 4/16 and the newly improved Danby worked great up until this last Sat. when I started getting air in the beer line above the keg coupler. My psi was set at 12, until I started seeing the air bubbles, at that point I bumped it up to 14. That helped a bit for a short time and now all I get is pint of foam after pint of foam and bubbles are still in the line. I did a complete cleaning today and afterwards I'm still getting all foam. My best guess is that my keg has gone bad. Are these the symptoms of a keg that is too old? Thanks for any help you can give me.