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Coffee too bitter

Coffee is too bitter — Grinding level or coffee type issue

Siemens · EQ900 TQ900 Coffee Machines

What does Coffee too bitter mean?

Your brewed coffee tastes excessively bitter. This can be caused by the grinding level being too fine or the coffee type being unsuitable.

Common Causes

  • Grinding level is set too fine
  • Type of coffee is not optimal

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set a coarser grinding level to reduce over-extraction and bitterness.

  2. 2

    Try changing the coffee variety to one known for a less bitter profile.

  3. 3

    Adjust the brewing temperature if possible, as very hot water can extract more bitterness.

Browse all codes in this manual (27)
Verified technical data. Last updated: April 2026

Related Faults

Appliance unresponsiveAppliance no longer responds — Appliance has a faultBrewing unit jammedBrewing unit cannot be removed — Locking device jammedCoffee grounds wet/not compactCoffee grounds are not compact and are too wet — Grinding or bean issue
Source: Siemens EQ900 TQ900 Coffee Machines
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