this post was submitted on 15 Mar 2024
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Anyone around who has experience with magnet valves? I got one here (in a coffee machine) that buzzes loudly when active, is that a sign it's going to bite the dust soon? Any suggestions for fixes, (storage.googleapis.com)
submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]
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Anyone around who has experience with magnet valves? I got one here (in a coffee machine) that buzzes loudly when active, is that a sign it's going to bite the dust soon? Any suggestions for fixes, like repeated descaling, or simply giving it a good whack? Or save myself the hassle and just get a replacement part?

/cc @coffee

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[–] [email protected] 7 points 8 months ago* (last edited 8 months ago) (1 children)

The espresso machine I bought off ebay for spare parts (to repair mine) had a buzzing magnet valve. (And the valve did not close)

It turned out the shower sieve was broken and on every cup the machine flushed coffee into the three way valve.

I used coffee machine degreaser and did a lot of backflushing with a "blind sieve" in the portafilter. With the degreaser buzzing slowly got better until it finally stopped and the valve closed correctly again. I never opened or changed the valve.

It was just dirty.

I'm using the machine I bought for spare parts for half a year now (and of course I replaced the shower sieve, which was about 7 euro or so)

(Oh and the machine is a Rancilio Silvia, my old one is 16y old and the spare parts one around 4y or so)

[–] [email protected] 3 points 8 months ago

Yeah most likely build up of coffee oil and a few thorough backflushes with espresso cleaner usually quiets the rattle

[–] [email protected] 3 points 8 months ago

I know some folks open them, clean them and change o-rings, etc. If it's not hugely expensive, I'd personally replace it when it goes. I don't know if buzzing is a sign of death but the ones in the espresso machines I've handled did not emit audible noise other than the loud clicking when they switch.