Tolock1,
First thing to check is that the TZT is set to look to the UHD for temperature in the sensor setup menu. Also the temperature sensor uses the white/brown wires, so brown goes to pin 4 and white to pin 5. Make sure that the WAGO connector is pinch on the wire and not on the insulation. If this looks OK you can use an ohm meter to measure the resistance of the temp sensor itself. If you unplug the orange WAGO connector and measure between the white and brown wire you should see around 9-11k ohms.
Snips
