SMEG Under-Extraction / Incorrect Brewing Parameters

Coffee tastes weak or watery, even on the strongest setting.

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Possible Causes

Grind too coarse on the integrated grinder, low brew temperature due to a scaled boiler, insufficient coffee dose from the dosing mechanism, worn brew group seals causing bypass

How to Fix / Troubleshooting

Safety first: Allow the machine to cool before internal cleaning.

  • Adjust grind finer: Turn the grinder adjustment one or two steps finer while the grinder is running, following the SMEG manual.
  • Increase strength setting: Use the highest aroma/strength setting so the dosing mechanism delivers more coffee per shot.
  • Descale machine: Run a full descaling cycle to restore proper brew temperature and pressure.
  • Service brew group: Remove the brew group, clean it thoroughly, and inspect the piston and seals. Replace brew group O-rings if they appear flattened or cracked.
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Repair Difficulty

Easy 2/5

Required Part

Brew Group Seal Kit
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