My barista shorts out the GFI switch!
We've had this GREAT machine for a long time. A (very long espresso-less) month ago, we plugged the machine in and pressed the on button and the GFI switch on the wall blew. I'm assuming it is a fuse - perhaps associated with the heating element. Any suggestions?
This is usually caused by the heating element rupturing and shorting to the boiler/casing. You can test for this by removing the top/back of the machine (6 small phillips-head screws) and checking for continuity across the heating element contacts (the two 90 degree prongs sticking out of the top of the boiler). If there's no continuity then the boiler needs to be rebuilt with a new heating element and boiler gasket.
Additionally, a heating element rupturing is usually caused by over-heating due to mis-use, so before putting the money into repairing or replacing it you might want to make sure you're using the machine properly. Regular descaling is also key to the boiler's health.
Have you tried the Barista in a receptacle other than the GFCI you are currently trying it on? I would try at a friends or neighbors house, just to rule out a service issue at your home or apartment. I once thought I had a faulty brand new microwave, when I tried using it it would cause the breaker to trip. I tried it at a neighbors house and it worked fine. It turns out that if I had my AC on and tried to use the microwave, it would cause the GFCI and breaker to trip. This is usually cause by insufficient amperage in older homes or apartments. If the same problem persists in another circuit, then it's safe to say that the Barista has a short somewhere. Check the power cord on the Barista for small nicks or abrasions, first, and if all is well there, you are going to have to open it up for further inspection.