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Thermal safety switch snapped (ECM Giotto)
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saulnierh
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Joined: 29 Oct 2010
Posts: 4
Location: Montreal
Expertise: I love coffee

Espresso: ECM Giotto
Grinder: Rancilio MD
Posted Sat Apr 20, 2013, 7:10pm
Subject: Thermal safety switch snapped (ECM Giotto)
 

Hi,
I've goofed...
While replacing the safety switch on my Giotto, I applied too much torque installing the new switch and it snapped... I'm now left with the screwable piece of the switch stuck in the boiler blocking the installation of another one (that I would install very gently).
I was wondering if you would have some suggestions to remove the screwable part (1/8" brass or copper) knowing that no part of it protrudes from the boiler (picture).
I was also wondering if I could just let it be and instead solder the remaining part directly to the boiler. Would it still read temperature correctly enough to be safe? Would the soldering damage the functionality of the switch (burn a circuit or something)? Would it damage the boiler?
Any input on resolving this issue will be appreciated.
Thanks!

saulnierh: image.jpg
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DavecUK
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Joined: 21 Sep 2005
Posts: 1,326
Location: UK
Expertise: I love coffee

Posted Sat Apr 20, 2013, 8:20pm
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

drill through the centre after centre punching it. (use a dremmel or similar if you have one). Once you have a pilot hole (don't go too deep), use a larger bit, to avoiv the threads, then you should be able to dig it out.
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steven_meyer
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Joined: 19 Jul 2003
Posts: 503
Location: San Bruno, ca
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Espresso: Alex Duetto 3.0, ECM  Giotto...
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Posted Sat Apr 20, 2013, 8:32pm
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

Go to your favorite hardware store and buy a set of easy outs.

http://www.toolprice.com/category/screwextractors/
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saulnierh
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Joined: 29 Oct 2010
Posts: 4
Location: Montreal
Expertise: I love coffee

Espresso: ECM Giotto
Grinder: Rancilio MD
Posted Sun Apr 21, 2013, 4:48am
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

Thanks for your answers.

I'm a bit hesitant to drill in it to use a screw extractor like easy out. As I've never used those, I fear I could make it worse (damage the threads of the boiler or stripping the screw to a point a screw extractor could not be used anymore). But removing this piece sure sounds like the only real solution.

Still, I was really drawn to the workaround idea of soldering it to the boiler with tin due to the apparent simplicity of the process (according it doesn't affect the functionality of the switch).

Any contraindication? If so, I'm going to practice the easy out operation before operating the Giotto.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
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Location: Riverside, Ca, U.S.A.
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Espresso: ECM Vene. A1, La Cimbali M32
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Roaster: gave it a try, decided no
Posted Sun Apr 21, 2013, 9:24pm
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

Do not try to solder the new one, all you will do is make a mess of everything.

If you can get something small and pointed in the hole like a small chisel, you might be able to put enough of a slot into the stud to get a screw driver on it and back it out.

I have done this before but I was lucky enough to have a very small piece of the stud above the boiler, I was able to get the dremmel motor with a cut off disc to it, to cut a slot in the stud then I simply unscrewed the stud and installed the new one.

It will not be tight in the hole, it is just sitting there waiting for you to back it out.

Some easy outs have a self drilling point. you use one side to drill the hole then flip it over in the drill and then unscrew the stud.

Good luck.

 
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saulnierh
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Joined: 29 Oct 2010
Posts: 4
Location: Montreal
Expertise: I love coffee

Espresso: ECM Giotto
Grinder: Rancilio MD
Posted Mon Apr 22, 2013, 4:02am
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

OK,
I'll work on the screw and leave my soldering aside.
Thanks all!
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earlds
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earlds
Joined: 16 Nov 2003
Posts: 492
Location: Mobile
Posted Mon Apr 22, 2013, 7:46am
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

youtube is your friend ,look for this one , screw extractor /easyout /broken bolt remover ..and there are others too.The easyouts that I use have a drill side and just flip it around and carefully tap the extractor side into the whole and take out the screw.This is a simple process just go easy one step at a time.Good luck..
Don
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ddubick
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Posted Mon Apr 22, 2013, 1:29pm
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

I don't know if I've ever seen an easy-out that small but I've only seen a few.

I would suggest a dremel with a small cutting wheel to make a slot in it - the smaller the diameter the better.  Yes you'll get a bit of the boiler too but you shouldn't have to go that deep.  Then use a screwdriver to back it out.
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frcn
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frcn
Joined: 23 Dec 2001
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Location: Northern California
Expertise: Professional

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Posted Tue Apr 23, 2013, 8:21am
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

OK... Since it was a new screw (or at least one that was previously removed) you are not having to deal with corrosion. best bet would be a rotary tool (Dremel or similar). Harbor Freight and other suppliers have economy tools that are like a Dremel. Use a SMALL carbide bit and carefully cut a slot in the remaining portion of the screw. That should allow the use of a small screwdriver to remove the broken part. Make the slot deep enough to get the screwdriver into it to take a good bite. if it doesn't turn out easily, apply heat to the boiler then cool the screw part. A inverted can of "Dust Off" or equivalent will work, or just a few small drops of water on the screw remains - chill the screw and it will contract. Even leaving the screwdriver in the freezer for a while will help if the boiler has been heated.

You do not need to tighten the screw that much (well, DUH a this point, no?). A thin film of heat transfer paste between the thermostat and the boiler is a good idea.

 
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saulnierh
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Joined: 29 Oct 2010
Posts: 4
Location: Montreal
Expertise: I love coffee

Espresso: ECM Giotto
Grinder: Rancilio MD
Posted Tue Apr 23, 2013, 3:09pm
Subject: Re: Thermal safety switch snapped (ECM Giotto)
 

As I have a hard time finding a small enough screw extractor, I guess I'm going to try to go with the Dremel/screwdriver approach. The hot boiler/cold screwdriver seems a good idea. I'll work on it this weekend and post results. Meanwhile, I still use the machine for my morning espressi.
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