Kitchen GFI breaker goes off when machine is plugged in - off or on

I usually add white vinegar and brew a few pots of water.

sometimes, a GFI will be controlled by another GFI. Did you "reset" the GFI ( if there is one ) in the bathroom? You have to find out where
The wires in the dead GFI come from. Electrical panel....circuit breakers. Did you flip each circuit breaker off then on to reset them ?
Do you have an electrical meter ? let me know then we will go from there.

If you have a Bryant load center, you can use other breakers in it, including the Eaton GFCB120 GFI since several companies unified their design. The GFI (ground fault interrupter) or GFCI (ground fault circuit interrupter), same thing, may be required for a device you are installing, such as bathroom, kitchen or outdoor fixtures.
The Eaton series includes very clear installation instructions, but if your problem is that they are missing, then all you do is install the breaker in a open slot in the breaker panel, but you have to attach the neutral [white] wire differently. On regular breakers, the neutral goes right to the ground lug in the panel. With a GFI breaker, it goes through the breaker, and then is connected to the ground lug.

The problem believe it or not your gfi is warn out. I am actually surprised it lasted as long as it has and surprised it worked at all. Espresso machines use a huge amount of power when turning on compared to maintaining power. When espresso machines first turn on the take a huge surge of power to start heating up the elements. Normally you want to put an espresso on a circuit /outlet that is directly to your breaker that is at least a 20 amp breaker. By code kitchens and bathrooms, where an outlet is near water, has to have a gfi outlet, this is for safety for something plugged in near water so it will trip if accident happens with appliance near water. The bad news there not to good with high demand power appliances such as espresso machines. Yes , you can replace the gfi circuit, by turning off main breaker, unscrew gfi from wall, pull out, and undo wires, and copy exactly when re-wiring the new one. Then turn on main breaker again. NOTE: you can buy a gfi all most any home improvement center, lowers, home depot, ace hardware etc.... Think of a gfi kind of like a advanced in line fuse, they do wear out. BUT AGAIN, my advice is plug it in a outlet that does not have gfi and is on a main breaker of at least 20 amps if you have that opportunity to do in your kitchen area. Hope this helps you, thank you....... MIKE

It is leaking to earth due to spilliage on the connections I expect.
It is not safe to use in that condition.

Chances are while you have a 20amp circuit in your kitchen the gfi you are plugging into is rated at 15amps. First make sure your outlet is connected to a 20amp circuit breaker and then change out the gfi for a 20amp one. This coffee pot is more for commercial than residential usage, I had the same problem until I changed out the gfi plug.

Go to your electrical panel and check your circuit breakers. You can check each one by turning each breaker off - then back on again. You should get back some of your electricity. Also, you probably have a GFI circuit breaker located in your kitchen (near the sink) and in your bathroom's (near the sink/basin). Make sure to push in the reset button (make sure it holds when you press it in). This will explain why you have some receptacles that are out in other parts of your house.  Why receptacles are wired through GFI's, etc... are to provide extra grounding protection. I hope this works for you. If not, feel free to contact me again with more information. Good Luck to you!

fire her ****!! and send her packing and find a new one LOL there is however a reset button under the front you can try to see if that helps

GFCI receptacles are polarized and connecting them correctly is critical. The hot wire should be black, blue, red, etc. The neutral should be white or natural gray. The ground should be green (if equipped).

Also, it's common to have other receptacles in a kitchen wired "downstream" of a GFCI so that if the GFCI trips or there is an issue with another non GFCI outlet, you're still protected.

Check all outlets in the kitchen and be sure they are wired correctly and in good shape. Unplug everything while you test. If the GFCI still trips, start looking for loose neutrals or bad ground wiring (or no ground) at the other receptacles since you said you already checked the breaker box.

A coffee maker can be a cuplrit that causes a GFCI to trip since it is a heating device and uses water, which can make them more susceptible to electrical problems. Check the microwave too (if equipped).

most Keurig cofee makers will trip 15amp GFI'S .
So you should unplug the machine take all the water out wait about 1/2 hour . Then plug it into an outlet that has at least 115volts and 20 amp breaker or fuse . You can purchase plu in testers at radio shack or electrical supply store.

let me know.