Siemens EQ 6 plus S100 Espresso Machine: Frequent Descaling Messages Post-Purchase

The Siemens EQ 6 plus S100 espresso machine frequently displays descaling messages shortly after descaling, sometimes after only a few coffees. Despite following official descaling procedures and multiple service interventions—including cleaning, part replacements, and module exchange—the issue persists for many users. Commonly suggested causes include clogged nozzles or spout channels, which can be cleaned by removing and washing the plastic and rubber components. Some users report that activating or replacing the water filter may reduce the frequency of descaling prompts, though this is not universally effective. Resetting the machine to factory settings or performing separate cleaning and descaling cycles rather than combined ones has helped some. The problem appears linked to software or sensor errors, as the machine sometimes falsely detects the need for descaling. Authorized service centers have replaced modules and pumps with partial success. Regular maintenance of the brewing unit, disposal of coffee grounds, and cleaning of milk frothing components are recommended to prevent errors. Water hardness, milk coffee consumption, and scale buildup influence descaling frequency. Some users report that after thorough cleaning and resetting, the machine operates normally for extended periods. However, others continue to experience premature descaling alerts, indicating a possible factory defect or software issue in certain production batches.
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