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Gaggia Classic boiler broken after visit from electrician
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Discussions > Espresso > Espresso Mods > Gaggia Classic...  
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randytsuch
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Posted Fri Aug 10, 2012, 12:39pm
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

One other think to check are the coffee and steam thermostats.

These are items 4 and 5 in the diagram.  If either one blew, then no heat.  I would also think these, are the thermal fuse are more likely to blow out from 220V instead of the heating element.

If it heats when you turn on the steam switch, then the coffee thermostat is bad.

If you don't have 115VAC at the heating element, its likely either the fuse or the steam thermostat.

Randy
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rabbit
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Posted Fri Aug 10, 2012, 3:34pm
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

i had a gaggia, and in the owners manual it stated unplug after use (each)...
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SJM
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Posted Fri Aug 10, 2012, 4:48pm
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

tracerbullet Said:

Hmmm, I've replaced a fuse like that on my dad's Gaggia and only the boiler was out not the whole thing. The diagram does show that it should all be dead, but I'd still track down the power routing w/ a multimeter to be certain. This worked on his machine anyhow (it lit up and pumped water, but only pumped cold water). His was a "Coffee" not a Classic, these machines are darn similar inside but there may be a difference.
.

Posted August 10, 2012 link

I don't know the answer to this question as to the correct placement of the thermofuse in different models and/or how they are wired, but we do have wiring diagrams for both the Coffee and the Classic at the Gaggia Users Group that I probably already mentioned in this thread.  (Sorry).  And, it makes sense that the wiring especially at the front end of the circuit would be more complex on the Classic just because more things have to be activated when the power-on switch is thrown.

Oh, and of course, a multimeter will sort this out without having to look up much of anything....
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sweaner
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Posted Fri Aug 10, 2012, 6:40pm
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

rabbit Said:

i had a gaggia, and in the owners manual it stated unplug after use (each)...

Posted August 10, 2012 link

Who actually does that?

 
-Scott
“Coffee - the favorite drink of the civilized world.”
Thomas Jefferson
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toddst
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Posted Wed Aug 15, 2012, 3:10pm
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

Unfortunately, my friend knows less about tracing wires than I had hoped. So, I'm just going to have to wait for the electrician to come back next week to figure which part got fried.

Thanks again for all the tips & links.
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tracerbullet
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tracerbullet
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Posted Sat Aug 18, 2012, 6:57am
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

Good point on the thermoswitches. If I remember right they are closed when cold, and open when hot (when they trigger), that's how they cut the current from the heater elements once things are at the right temperature.

It's possible one of them is stuck open, thinking that things are up to temp when they are not? Does the light on the switch come on, that when things are working tells you it's at temp and ready to brew?
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toddst
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Posted Mon Aug 20, 2012, 3:06pm
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

tracerbullet Said:

Does the light on the switch come on, that when things are working tells you it's at temp and ready to brew?

Posted August 18, 2012 link

Sorry that it took me a while to respond, I was out of town... That light doesn't come on (only the power light comes on).

The electrician is going to stop by next week. I miss my morning espresso!
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tracerbullet
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tracerbullet
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Posted Mon Aug 20, 2012, 4:46pm
Subject: Re: Gaggia Classic boiler broken after visit from electrician
 

Ahh, so the thermoswitches are probably OK. Sounds like they aren't thinking it's already hot, and breaking the circuit and preventing heating.
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