Olympia Replacement Square Switch Orange Button Power Brew
This is a replacement switch for older cremina's with the square switches. Also will fit on older maximatics and Coffex.
This item is sometimes used as a power switch or coffee button depending on the machine model.
Very Expensive but Good Replacement for OLympia Caffarex VT Brew Switch!
Posted by Orrin Charm on 5th Jul 2016
I have a very old Olympia Caffarex VT espresso machine that is wonderful, but definitely showing it's age! The brew pushbutton that usually gets pressed to start the brew pump, and pressed again to stop recently lost it's latching function, so I needed to hold it down to brew, and I was afraid it would soon stop making contact altogether. I asked Johnny Cerini if he had a replacement, and he suggested this one.
It was $40.00 for what was probably once a $3.00 part, but I'd looked for a long time for one that would fit, so I splurged on it.
One issue was that the old switch had six contact FastOn connector tabs, and some of the replacements only had four.
In typical Italian wiring fashion, there was no schematic, and it was not obvious how the various connections actually functioned!
I was very concerned about the switch, as I knew once I got the old one out, it wasn’t going back, as the case was very brittle!
Once I got it out, I discovered that it was a DPST switch, and the third pair of contacts were for a 120vac neon lamp.
The replacement switch is a DPDT switch, and the third pair of contacts are the Normally Closed pair. I found that it also has a 120v neon lamp, but it is internally wired to the Normally Open contacts.
I’m guessing that the other switch would have worked just as well, since the NC contacts weren’t needed for this machine. I don’t know if it has a light as well.
With the internal light, if you connect the power feed to the Common terminals, the switch lights up whenever the power switch is on. If you connect the power feed to the NO terminals, the light only goes on when the pump is running.
Since the pump makes plenty of noise, it really doesn’t matter what the light does! (I was concerned that the third pair of contacts might be NC for the relief valve, but that turned out not to be the case)
I ended up just covering the FastOn terminals on the cables that were going to the light with heat shrink tubing, rather than re-wiring everything.
The opening in my Caffarex was about 0.5mm too small for the new switch, so I had to file it out a bit. The width of the hole was fine.
I put it all back together, and it works fine! Thank you!!
It's actually a rocker switch rather than a push-on-push-off switch, but that's actually an improvement.