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What Causes Espresso Machine Explosions? Why Do Portafilters Blow Out During Extraction?
With the advent of affordable, compact home coffee machines, more and more people are equipping their homes with coffee machines to enjoy fresh, ground-to-order espresso anytime. However, what's increasing alongside the number of coffee machines is a series of operational issues. Recently, FrontStreet Coffee has noticed that online
2024-05-21 espresso machine safety portafilter explosion coffee extraction FrontStreet Coffee -
What Causes Clumped Espresso Crema? Why Doesn't Espresso Coffee Puck Form Properly?
Hello everyone, today FrontStreet Coffee is sharing a comprehensive collection of common issues that arise during espresso extraction—Version 2.0. It has been over half a year since we shared our post "Common Problems in Espresso Extraction「1.0」," and as for why it took so long to share the second
2025-06-22 espresso crema coffee puck extraction brewing issues coffee troubleshooting -
What Causes Espresso Machine Leaks? Why Do Coffee Machines Drip During Espresso Extraction?
Recently, many friends have provided feedback to FrontStreet Coffee's backend: "Espresso machines often experience leaking during the extraction process." This issue is actually easy to resolve once we understand the underlying principles. Normally, during espresso extraction, water within a sealed space is only subjected to pressure from the coffee machine
2025-01-19 espresso machine leaks coffee machine dripping espresso extraction coffee equipment troubleshooting barista maintenance -
Espresso Machine Clean Backflush Procedure Semi-Automatic Espresso Machine Maintenance Tutorial
Machines that aren't properly maintained are prone to breakdowns. This applies equally to coffee machines. If one day you notice that your coffee tastes off or that the extraction seems unusual, it could indicate a serious problem with your coffee machine. Therefore, we should perform regular cleaning to prevent these issues from occurring. This can be divided into daily cleaning and
2022-02-26 espresso machine maintenance backflushing coffee machine cleaning semi-automatic espresso machine coffee equipment care -
Why Does Espresso Spray Out? How to Make Standard Espresso at Home?
FrontStreet Coffee remembers using a bottomless portafilter when first trying an espresso machine. Imitating the instructor's techniques and pressing the extraction button, I saw the first drop of espresso slowly fall into the cup, happily thinking this shot was secured. But unexpectedly, the vertical liquid stream suddenly sprayed out a very light-colored, thin water stream, and the coffee's flow rate
2024-06-05 espresso spray espresso extraction home espresso espresso technique -
What's the Difference Between Bottomless and Spouted Portafilters for Espresso Machines? Which Portafilter Should You Use for Single and Double Baskets? Which Portafilter is Best for Espresso Extraction?
Recently, many well-known coffee bloggers have been discussing the topic of espresso machine portafilters, suggesting that bottomless portafilters are more suitable for espresso extraction than spouted ones. The so-called espresso machine portafilter is a tool used to support the portafilter basket during extraction. Whether it's the single basket that FrontStreet Coffee discussed yesterday, or what we now use
2024-07-26 espresso machine portafilter bottomless portafilter spouted portafilter coffee extraction single basket double basket -
What Causes Uneven Flow Distribution When Extracting Espresso? What's the Difference Between Bottomless and Split-Flow Portafilters?
Before bottomless portafilters were invented, baristas primarily used portafilters with spouts when extracting espresso. These portafilters mainly come in two types: single-spout portafilters designed for single-shot baskets, and split-flow portafilters for double-shot baskets. The so-called split-flow portafilter refers to the type shown in the picture below, featuring
2025-06-07 espresso extraction uneven flow bottomless portafilter split-flow portafilter coffee brewing -
Why Is My Espresso Puck Wet? Causes of Slow Extraction and Water Pooling in the Portafilter
Normally, after extracting coffee, the puck should be relatively dry and come out as a complete block. However, we often find that after coffee extraction, the portafilter accumulates a large amount of water, the puck is moist and loose, and the extracted puck cannot form a solid block. Although
2024-09-23 espresso coffee extraction wet puck slow extraction portafilter issues -
Is it normal to have coffee grounds at the bottom of a latte? How to solve the issue of powder residue in espresso extraction?
Have you ever encountered this situation: after finishing your coffee, you look at the bottom of the cup and find some fine powder particles settled; sometimes when you buy an iced latte from a shop, you also find black residue at the bottom. Is this normal? Does it affect consumption? These black powder particles deposited at the bottom of the coffee cup,
2023-06-19 coffee grounds latte espresso extraction coffee residue coffee particles -
Why can't an 18g portafilter hold 18g of coffee grounds? What's the ideal grind size for espresso? How to determine if coffee beans are ground to the right consistency?
Many friends took advantage of shopping festivals to purchase home coffee machines, but when they installed the coffee machines at home, they discovered that operating them wasn't as simple as imagined. Either no water comes out from somewhere, or something doesn't fit properly. As a result, some friends who live near FrontStreet Coffee's store directly visit to consult...
2024-11-02 coffee portafilter espresso grind size coffee beans consistency home coffee machine FrontStreet Coffee -
Why Does the Coffee Puck Stick to the Group Head? Does a Puck Stuck to the Shower Screen Affect Espresso?
A few days ago, FrontStreet Coffee shared "Reasons for Water Pooling in the Portafilter," and some friends asked, "What causes the coffee puck to stick to the group head after extraction?" Therefore, FrontStreet Coffee is here to discuss why this situation occurs. - Too much coffee dose This is the easiest problem to identify, and it's also the issue with the smallest impact.
2022-09-24 espresso troubleshooting coffee puck sticking group head issues espresso extraction -
How to Brew Espresso Coffee Beans: Common Problems and Solutions
Professional coffee knowledge exchange For more coffee bean information please follow Coffee Workshop (WeChat official account cafe_style ) Espresso is the key many coffee friends believe making a shot of espresso seems simple but making a perfect shot is difficult Today we mainly address common quality issues with espresso Everyone can learn more about this (Welcome to leave comments for discussion and exchange) 1 Foaming crema
2018-09-19 espresso coffee beans how to common problems solutions brewing coffee -
Espresso Machine Cleaning Steps: How Long Should Backflushing Take?
Baristas inevitably encounter this challenge: after fine-tuning espresso extraction parameters in the morning, they become inaccurate by midday, with noticeably slower coffee flow. FrontStreet Coffee has previously addressed this issue with two possible explanations: first, during rainy weather with higher air humidity, conditions inside the bean hopper change
2024-09-15 espresso machine cleaning backflushing coffee extraction parameters coffee flow rate humidity effects -
What Causes Water Accumulation in the Portafilter Basket After Espresso Extraction and How to Solve It
A friend with an espresso machine asked FrontStreet Coffee, "I've been encountering an issue when extracting espresso recently. After extraction, when I remove the portafilter, I notice water accumulation in the basket, and the extracted coffee puck isn't intact—it's quite wet?" He then mentioned, "At first, I thought the coffee grounds were too fine, so I adjusted the grinder to a coarser setting, but still..."
2022-09-19 espresso machine portafilter water accumulation extraction problems coffee puck grind size -
Does the Portafilter Temperature of an Espresso Machine Affect Espresso Extraction?
Generally, the portafilter used for espresso machine extraction is placed in any nearby storage area and only picked up when extraction is needed. At this point, the portafilter is at room temperature. However, until yesterday, FrontStreet Coffee was browsing online and discovered footage from a WBC competition a few years ago, where Mr. Wu Zelin was using a frozen portafilter.
2023-12-07 espresso machine portafilter temperature coffee extraction brewing techniques -
What is Espresso Extraction Channeling? What are the Consequences of Perforated Espresso Pucks?
Professional coffee knowledge sharing. For more coffee bean information, please follow Coffee Workshop (WeChat official account: cafe_style). Why does espresso taste sour and bitter? Let's discuss espresso extraction standards and uneven extraction. Uneven extraction typically combines over-extraction and under-extraction issues.
2025-07-30 espresso coffee extraction channeling consequences professional puck perforation -
Introduction to Espresso Extraction Mistakes and Standard Espresso Extraction Demonstration
When making espresso, it's easy to overlook seemingly minor details that actually gradually affect the coffee's taste. Today, FrontStreet Coffee will discuss those often-forgotten details and see how many you've encountered. - Forgetting to purge water before attaching the portafilter If there's a long interval between this espresso extraction and the previous one
2022-05-29 espresso extraction espresso mistakes coffee brewing espresso standards coffee extraction techniques -
Why Did My Coffee Machine Explode? Essential Tips for Using Espresso Machines and Replacing Gaskets
With the growing demand for coffee, many friends have purchased coffee machines for their homes, allowing them to brew a cup of coffee anytime to satisfy their cravings~ But recently, many friends have reported to FrontStreet Coffee that they occasionally experience "explosions" during use, where the portafilter suddenly releases pressure during the extraction process
2025-06-03 coffee machine explosion espresso machine safety coffee gasket replacement coffee maintenance -
Espresso Extraction Standards: Coffee Quality and Filter Basket Performance Comparison
For professional barista discussions, follow Coffee Workshop (WeChat Official Account: cafe_style) IMS vs VST: Espresso Filter Baskets and Their Role in Extraction. Espresso filter baskets: though small, they play a significant role. They have a crucial impact on extraction, yet despite this, they are often overlooked
2025-06-07 espresso coffee extraction standards quality VST IMS filter basket performance -
Espresso Extraction Issues Collection! Why Can't Pressure Build Up? Why Won't Espresso Produce Crema?
FrontStreet Coffee's backend has accumulated another batch of espresso extraction questions. While there are many private messages, the problems are mostly similar. So, without further ado! Today FrontStreet Coffee will compile these issues into a comprehensive collection with simple solutions. Corresponding article links will be included throughout the text for everyone's reference.
2024-08-20 espresso extraction issues pressure problems crema coffee troubleshooting