Is it necessary to put the thermostat floor temperature sensor (s) in the corrugated tube?

The floor temperature sensor must be put into the tube and the end sealed with aluminium tape (as indicated in the heating cable or heating mat installation manuals). This is necessary to prevent the tile adhesive from getting inside the tube. If it is necessary, you will be able to pull out the sensor through the thermostat installation box and replace it with a new one.