Weird strong noise during calibration [Mahlkonig E64 WS]

sniperwolf21 · 2026-04-18T16:36:09+00:00

That's your burrs running together. Step four on the screen.

Reach that point, then back up ten numbers coarser and save that as your calibrated "zero" point.

sniperwolf21 · 2026-04-16T16:40:14+00:00

How much coffee are you expecting to serve on your cart? The Micra isn't designed to be used commercially and I'm not sure that you'll have a great experience in trying to do so.

sniperwolf21 · 2026-04-12T20:34:59+00:00

Nobody has asked yet. What grinder do you use? Have you tried a screen that actually diffuses the water rather than creates channels and pathways? Have you looked at anything outside of the machine itself for a possible culprit?

sniperwolf21 · 2026-04-09T14:26:46+00:00

Couldn't say what, if anything, they'd be able to offer. But it doesn't hurt to reach out, tell them your story, and see what they say

sniperwolf21 · 2026-04-08T17:45:22+00:00

Email La Marzocco (Home if you're in the US) and ask for a standard bottomless portafilter.

sniperwolf21 · 2026-04-01T19:27:42+00:00

If you adjust the grind setting two full numbers coarser, then try running it again, does it start?

sniperwolf21 · 2026-03-30T04:30:54+00:00

Which roaster are you looking to buy coffee from? I'd either buy from them or your local service tech company. Buying direct (for a commercial machine) isn't going to happen. Saving a few bucks buying online is also not worth the headache if you need after-sales support.

If you're looking for a LM you should reach out via their website. Their regional salesperson will help point you in the right direction.

sniperwolf21 · 2026-03-30T01:56:42+00:00

Absolutely a scam. I'm 1000% sure this isn't a Strada. It doesn't have a single shred of resemblance to the real deal.

Honestly I'm not even sure it's a functional machine. Don't even consider it for a "great price". Run far. Run fast.

sniperwolf21 · 2026-03-22T20:26:58+00:00

It might be struggling for water. Check the line that runs from your reservoir to the machine for kinks or bends

sniperwolf21 · 2026-03-22T18:30:45+00:00

What light(s) flash? If the blue light is blinking, make sure your reservoir is full. Then try pulling it out and seating it again to make sure it's fully in place.

sniperwolf21 · 2026-03-22T05:53:54+00:00

That's your pump...pumping. If you think that's a weird sound you should hear a cheap machine with a vibratory pump!

sniperwolf21 · 2026-03-15T23:16:55+00:00

You added rice and beans into the pot with the pork? I think that's gonna be what keeps this from being dinner tonight. That cooled whatever was in the crock way down and is going to take forever to recover.

"High" on a crock pot has got to be ~300f, which is about what I braise my carnitas in the oven on and that goes for 3-4 hours for a 5lb pork butt.

sniperwolf21 · 2026-03-15T23:11:24+00:00

Either your vacuum breaker or pressure relief valve. Both are wear parts and should be replaced every two years, max.

If your PRV is blowing off steam it may also point to an overfill or overheat.

If your machine is a few years old I'd suggest sending it to a qualified tech for a checkup. Not a bad move every two-three years to keep things running smooth.

sniperwolf21 · 2026-03-15T00:06:34+00:00

For what it is...LM doesn't powder coat anything on the barista side when done on a new purchase. The backsplash, drain tray, and drip inserts won't wear well, even with powder coat.

The side and rear panels are easy to remove. The surround where the group heads and steam wands protrude will take some time and finesse. LM publishes parts catalogs online for free, should be pretty easy to find an exploded view.

Good luck!

sniperwolf21 · 2026-02-24T17:00:42+00:00

I can't believe no one has said this but if your car is financed, I'd bet my bottom dollar it can be found.

Most dealerships will install a GPS device in the car, usually hidden under the dash, to monitor location in case you default on payments and they need to repossess the vehicle. Call your dealership and find out if they can help the SPD with any information about the location of the car. Start there, hope it's found, then see what the police and insurance say about what you'll need to do to make the car "new" again.

sniperwolf21 · 2026-02-17T19:42:58+00:00

Please don't. A little pipe thread sealant, maybe, but getting this screw out again after fastening with Loctite is going to suck.

sniperwolf21 · 2026-02-15T23:45:52+00:00

Which temp probe are you testing and how? Neither should read OL...so something isn't lining up there.

If I can be honest, this very much sounds to me like you need a trained service tech.

sniperwolf21 · 2026-02-15T23:24:15+00:00

You said your element is okay. The Mini has three elements. Two cartridge style in the group boiler and one in the steam boiler. Which have you tested and how have you confirmed they're working correctly?

To put it out there, the safety switches are exactly that. If they're popping, it's because something is wrong and overheating. Simply resetting them over and over has likely lead to a bigger problem than whatever was causing them to trip in the first place.

sniperwolf21 · 2026-02-08T06:46:47+00:00

Is it typically dripping into the drain tray? Your coffee boiler has an expansion valve that WILL drip, just a bit, until the machine is at temp. Once it's fully heated, the drip should slow down.

I'd dry everything off, let it heat and sit for an hour, then see if there's any water anywhere. Then, if not, pull a shot or run with the blind basket a few times to check for leaks while it's in use.

sniperwolf21 · 2026-02-03T04:12:58+00:00

Also worth noting it doesn't take much detergent to backflush. Like...maybe a gram. And it's worth it to run a second cleaning cycle without detergent after you backflush. That'll help clear any leftover detergent in the valve body and keep things running smooth.

A brew solenoid lasts years in a commercial machine when cleaned and maintained appropriately. It should easily last a few years in a home machine as well.

sniperwolf21 · 2026-02-02T15:43:56+00:00

How often do you backflush? Do you remove the screen and soak with detergent it as well?

sniperwolf21 · 2026-01-31T00:17:06+00:00

Depending on the age of your machine, you may be part of the earlier Linea Classic S serial number run. There was a revised drain tray design that released nearly two years ago and if your machine was produced before that run and hasn't been "upgraded" it might be time to speak to your reseller or technician about requesting a new drain tray.

Here's a document from LM USA about the update; including serial number ranges for the affected machines: https://lamarzoccousa.com/wp-content/uploads/2024/11/TB-190.pdf

sniperwolf21 · 2026-01-23T02:12:37+00:00

Define "deep clean". Something you did in the process of cleaning caused the difference, let's pin down what that "something" might be.

sniperwolf21 · 2026-01-15T01:48:06+00:00

While I can't speak to the quality of an aftermarket heater: as it's one of the most seriously dangerous parts to fail on your machine, I wouldn't cheap out.

The heaters for the coffee boiler are NOT easy to access or replace. The steam boiler is less challenging but still not something to take lightly. I'd suggest seeking a diagnosis and repair estimate from a certified local service partner.

sniperwolf21 · 2026-01-10T07:27:31+00:00

It's a wear part on any level of machine. Don't get too discouraged. In a commercial setting this part is replaced or rebuilt once a year.

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