There could be several reasons why the Calc light on your Senseo coffee machine stays on.
1. The machine may require descaling: The Calc light is generally an indication that the machine needs to be descaled. Over time, mineral deposits and limescale can build up in the machine, affecting its performance. Refer to the user manual for instructions on how to properly descale your machine.
2. Incorrect descaling procedure: If you have performed the descaling process but the light stays on, it could be possible that the descaling was not done correctly. Ensure that you followed the instructions precisely, including using the recommended descaling solution and completing all the necessary steps.
3. Malfunctioning light indicator: In some cases, the Calc light may remain on even after the machine has been properly descaled. This could be due to a malfunctioning light indicator. If you suspect this is the case, try resetting the machine or contact the manufacturer for assistance.
4. Other issues: If none of the above solutions work, there may be other issues with your Senseo coffee machine. It could be a faulty sensor or a more serious internal problem. In such cases, it is best to contact customer support or the manufacturer for further troubleshooting or to arrange for repairs.