Troubleshooting Sensors
Schluter recommends that 2 sensors are installed underneath the tile. Not because sensors have a tendency to be bad (very rare to get a bad sensor), but because a sensor may unintentionally be installed in an area close to a heat source. Installing a sensor close to a heat source will cause the thermostat to think that the floor is already warm. It is a good idea to install the sensors in an open area of the floor where there will be no throw rugs, sunlight, HVAC/heat registers, etc. Sensors must be installed between the heat wire of 3 puck spacing (do not install the sensor between 2 puck spaced wire in a tiled application). Occasionally we get calls about sensor errors (E2 Sensor Error) or floors reading incorrect temps - or not heating at all. This can be the result of the sensor being installed in the incorrect ports, or as shown below, where the two sensors are twisted together and installed in the correct ports. Although C & D are the inp...