Gaggia Carezza doesn't brew

as per manual https://www.gaggia.com/wp-content/uploads//2019/02/MANUAL-CAREZZA-US_ENG-FR-ES.pdf - At the end, press and hold the coffee brewing and steam dispensing buttons for 3 seconds: the descaling light turns off.

It is a standard switch, so you can repalce it, as long as you know what you are doing

Usually it is the switch itself that has failed. Order the switch from your appliance repair/supply business and replace the item in the machine. A lot of these switches have plastic 'ears' that need to be pressed in to release the old part and the wire connections are usually 'push-on'. Some that are held on by a formed metal clip usually require breakage of the clip to release the part and the new switch should have a replacement clip. Hope this helps!

The description sounds like the switch has failed due to it's internal contacts arcing. I have a like problem with Mary214 that is ongoing. Please follow that thread to find your fix.

Here is a list of gaggia dealers, one of them might have it, if not check with radioshak.

I do not have it so you can skip me.

http://www.wholelattelove.com/Gaggia/gaggia_pannarello.cfm

look on top of the boiler you will find a microthermo  it trips when the machine gets too hot and you are going to have the replace it. now i posted the fix in a form for the same thing. and where to get one. 

as i understand from your decriptition, you had temperatire rising in extreme point. termofuse should worked but it didnt, i advice you to change all 3 and some seals:

1. Thermofuse
2. Thermostat water L=107C
3. Thermostat steam L=145C
4. Gaggia gasket 6-pc. Kit (during changing them you can clean boiler too)

here is the link for diagram:

http://www.partsguru.com/user/Carezza%20diagram%20and%20parts%20list.pdf

here is the link for parts:

http://www.partsguru.com/GaggiaCarezzaespresso.html

Pull off entire plastic wand off by unscrewing the top plastic piece. Inside the piece that connects to the screw top you should see two o-ring type spacers. The top one should be hard pastic and the one beneath should be rubber. Take the entire unit apart and clean, making sure to put all pieces back in the way they came out.

To put back on, take the top piece and put it back on the metal stem first then put the rest of the wand back on and gently push it as far up the metal stem as possible and screw back together. If you don't have the rubber spacer this could be the problem since the wand really has nothing grabbing onto the metal stem except for the rubber spacer. If this doesn't work, order another wand:

http://www.wholelattelove.com/Gaggia/gaggia_pannarello.cfm

I just bought a broken Carezza for my office (and hacking)-- the owner said the power switch only worked when he held it down hard.

Taking it apart, the main power switch-- a DPDT automotive-style unit-- is broken on one pole-- the wire connectors are slightly melted and darkened, and the switch has melted, discolored plastic around the metal tabs.

A new switch should bring it back to life, and I'll install a removable power cord and 15A fuse for niceness/safety-- the switch is rated for 20A at 125VAC so shouldn't have fried.