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No hot water

Appliance is not dispensing hot water — Milk system blockage

Siemens · EQ900 TQ900 Coffee Machines

What does No hot water mean?

The coffee machine is failing to dispense hot water. This can occur if the milk system, which may share components with the hot water dispenser, is soiled or blocked.

Common Causes

  • Milk system is soiled or blocked

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Clean the milk system thoroughly, either manually or by placing it in the Dishwasher.

  2. 2

    Ensure all parts of the milk system are correctly reassembled after cleaning.

  3. 3

    Descale the appliance if there is a heavy build-up of limescale, which can affect water flow.

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
Open Manual (Page 64)Search more codes in this manual