Problem Cause

Water Temperature Too High

Brewing water is above optimal temperature, causing over-extraction

How to Identify This Issue

Ground texture and uniformity

Puck surface and distribution

Symptoms of This Issue

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Run 2-3 seconds of water through the group head before inserting your portafilter. This stabilizes temperature.

Expected Result

More consistent temperature, especially important for single boiler machines.

If your machine allows, adjust brewing temperature. Try 92-96°C for most coffees. Light roasts prefer higher, dark roasts lower.

Expected Result

Better flavor balance, reduced sourness or bitterness depending on adjustment direction.