Nuova Simonelli Aurelia Espresso fuse keeps tripping

SOURCE: Pump keeps running and excess water goes into the cup tray

check the level probe on side of boiler may not be facing down as it should or need to be replaced.

SOURCE: Nuova Simonelli Premier

Could be a couple of things. You will know if the pressure is bouncing around by watching your gauges. You want to pull between 9-10 bars when pulling a shot. The programming issue could be the fact that if it is used it could have what I like to call
a touchy brain board. Those do have to replaced every so often depending on how much use the machine gets. You can reprogram whenever shots start pulling bad until you have no choice but to replace the brain board. They are cashy. To program: push the stop and pitcher button at the same time and all lights will start flashing on that head. Have your grind set, use a lined shot glass and measuure your shots according to short or long, watching the flow, crema etc. The ultimate shots pull between 25 and 28 seconds.
Hope this helps.

SOURCE: nuova simonelli appia 1 ....pump will not stop pumping so tank fu

Your level probe is on the right hand side plate of the boiler, normally with a red wire leading to it.
I would take the probe out (spanner reqd, obv. with no pressure in the boiler) and clean it with wire wool.Scale often causes the probes to malfunction.
Then make sure when you refit the probe, the part of the probe in the boiler faces down.

SOURCE: Empty light on espresso machine won't turn off and tank is full

I have the same machine. I just went on the coffee geeks website and it is easily solved. Just add a few grains of salt to the reservoir - the sensor cant detect water that is purified - strange but true as four grains and it fired up just like that.

SOURCE: Need repair service in Denver, CO

Call Maric Beverage Systems they are very knowageable & the best service company in my opinion on Nuova Simonelli as well as all the others. 719-380-1610