What the water level sensor does
The water level sensor monitors how much water is in the tank or in the coffee machine's circuit and sends this information to the control unit. Based on its signal, the machine knows when to refill water, when to start heating, or when to stop preparation to prevent it from running dry.
Signs of wear or malfunction
A faulty or dirty sensor most often shows up as the coffee machine reporting a lack of water even when the tank is full, or it may stop responding to the actual water level and start heating without water. It can also happen that the machine fails to detect that water is running out, causing preparation to stop mid-cycle or an error message to appear on the display.
Why you shouldn't put off the replacement
A malfunctioning sensor can lead to overheating of the heating element or repeated interruptions during beverage preparation, which puts extra strain on the machine's other components. Timely replacement prevents bigger failures and ensures that the coffee machine reliably indicates the actual water level.
How to choose the right part
- Check the compatibility of the specific sensor in the product table.
- Make sure it has the same type of connection and placement as the original part.
Compatible with
- EQ.700 TP707D06 classic
- EQ.900 TQ903D03 Steel
- EQ.900 TQ903D09 Black
- EQ.900 TQ905D03 Steel
- EQ.900 TQ905DF9 Black
- EQ.900 TQ907D03 Steel
- EQ.900 TQ907DF Dark Inox
- EQ.9 TI903509DE S300
+ 22 more compatible models
- EQ.9 TI905501DE S500
- EQ.9 TI907501DE S700
- EQ.9 TI907F01DE
- EQ.9 TI923509DE S300
- EQ.9 TI9555X1DE S500
- EQ.9 TI955F09DE S500
- EQ.9 TI9575X1DE S700
- EQ.9 TI9575X9DE S700
- EQ.9 TI957FX1DE S700
- EQ.9 TI917M89DE s700
- EQ.9 TI921509DE S100
- EQ.9 TI9555X9DE s500
- EQ.9 TI9558X1DE S500
- EQ.9 TI9575X7DE S700
- EQ.9 TI9578X1DE S700
- EQ.9 TI957FX5DE S700
- EQ.9 TI909701HC S900
- EQ.9 TI913539DE S300
- EQ.9 TI915531DE S500
- EQ.9 TI915539DE S500
- EQ.9 TI917531DE S700
- EQ.9 TI917F31DE
| Manufacturing company | BSH Hausgeräte GmbH |
|---|---|
| Address | Carl-Wery-Straße 34, 81739 München, DE |
| siemens-infoteam@bshg.com |







