Hoping someone can make life easy for me, i've had a customer bring in a Saeco Via Venezia (the stainless steel one) with the fault of tripping the house circuit breaker. Being that my boss spoke to the customer, he didn't ask for the information i would have to make my troubleshooting easier. Tried calling the bloke this afternoon and couldn't contact him on 3 different phone numbers 
I have so much work on that i'm basically doing all myself that i can't spend the time fault finding this thing much more than basic stuff. I opened it up and went straight for the boiler element as i figured this was the most likely cause. In circuit and out of circuit it measures 55 ohm or so which seems normal for an element to me. When testing each terminal to ground, i get mixed readings from 1.5M ohm down to 120K ohm. I'm not sure if this indicates a short between the element and ground or if it's just residual from something. Should i get an absolute open circuit from the element to ground?
Measured the pump, no continuity one way and 0.72V the other way, indicating an operational diode. Measured continuity through the thermal fuse on pump and it's ok. All thermal fuses on the boiler are ok and there's no signs of scale buildup or leaks or burn marks or anything, it looks fine.
Powered the thing up and it turned on and heats but i do hear a hissing sound that builds after about 10 seconds after turning it on, sounds like a leak perhaps? I turned it off because i didn't feel like blowing stuff at work this afternoon and i didn't want to risk the customers equipment i had running. I intend to test it further when i get to work tomorrow morning., like pump/boiler/steam functions.
Could him running the boiler dry cause it to blow or something? I haven't worked on a boiler machine before you see. If anyone has any quick tips on easy troubleshooting ideas chuck them out there.
Also, being that we don't advertise repairing coffee machines (i intend to in the future once i get more experience and i'm not under my current employer) spare part availability is slim and i don't want to risk expensive parts if i can help it.
Cheers

I have so much work on that i'm basically doing all myself that i can't spend the time fault finding this thing much more than basic stuff. I opened it up and went straight for the boiler element as i figured this was the most likely cause. In circuit and out of circuit it measures 55 ohm or so which seems normal for an element to me. When testing each terminal to ground, i get mixed readings from 1.5M ohm down to 120K ohm. I'm not sure if this indicates a short between the element and ground or if it's just residual from something. Should i get an absolute open circuit from the element to ground?
Measured the pump, no continuity one way and 0.72V the other way, indicating an operational diode. Measured continuity through the thermal fuse on pump and it's ok. All thermal fuses on the boiler are ok and there's no signs of scale buildup or leaks or burn marks or anything, it looks fine.
Powered the thing up and it turned on and heats but i do hear a hissing sound that builds after about 10 seconds after turning it on, sounds like a leak perhaps? I turned it off because i didn't feel like blowing stuff at work this afternoon and i didn't want to risk the customers equipment i had running. I intend to test it further when i get to work tomorrow morning., like pump/boiler/steam functions.
Could him running the boiler dry cause it to blow or something? I haven't worked on a boiler machine before you see. If anyone has any quick tips on easy troubleshooting ideas chuck them out there.
Also, being that we don't advertise repairing coffee machines (i intend to in the future once i get more experience and i'm not under my current employer) spare part availability is slim and i don't want to risk expensive parts if i can help it.
Cheers

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