Every time I make a filter change on my Jura Capresso Impressa E8 I get to the point where I am to open the tap in order to rinse the filter i experience what appears to be an air lock. I can continuously recycle between open tap and shut tap (a large number of times) and so far I have ultimately been able to get the machine to "catch" and pump the steam, expelling about 20 ounces of water. The machine then works well until I once again have to change the filter. This is definitely not normal. I have sent the machine to customer care twice while still under warranty but now they want $225+. Any suggestions? Thanks!

The problem as you described is have to do with your vibration pump. Is a very popular problem with vabrating pumps. They work purfect but as soon litle air is trap at there exit valve which is consist from two springs and one small teflon ball then you have the problem you have described. Manytimes repeating the descaling progress can solve the problem and in other cases if you desasemble the vibrating pump and brush it out from scale deposits and water dirt and rust then again you can solve the problem. If both the above can not give any results then you need a new pump. Many times it worth the effort to replace the pump from the first time so you will avoid all the desconfort and have results at once.