I have the same problem. I recently came home to my parents house and looked at their kegerator, which has no bubbles or empty space in the beer line. We put in a new keg of Stella Artois only after an hour or so of bringing it home, at which time the temp was a bit warm, and still no bubbling in the line. Yet at school with my kegerator, i tap the keg and always get these bubbles and empty space, which i believe is contributing to my "stale" beer. I have changed the elbow shank, beer line, CO2 line, coupler, added an in-line CO2 filter, and took my regulator to be checked for leaks, with a constant pressure of 14PSI and 38F temp. I have no clue what to do and I'm getting very frustrated as you might imagine. It's been going on for over 3 months and I'm still spinning in circles.
P.S. I've been hearing that a blower will provide cold air throughout the tower (assuming that's why the bubbling is occuring), yet are they really practical/necessary with a home kegerator?
Also, could the faucet or CO2 regulator play a role (mine are both around 20 yrs. old) in the bubbling in the line?
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