Some difference in the measured temperature is considered normal because of the measurement uncertainties of the devices. If the difference is more than 10-15 degrees you should check your temperature sensor and sauna thermometer.
You probably need to replace your temperature sensor when even after fixing all the above-mentioned issues:
There could be a problem with the cable connection.
Take down the sensor and try connecting it to the main module using another suitable cable. If the sensor works, you just need to replace the cable. If it still does not work, the sensor needs to be replaced.
In these cases, please contact us at support@huum.eu.
In most cases, this happens when the cables of the remote control are not connected correctly.
If your UKU GSM controller does not connect to the network after connecting your app user account to the controller, please contact us and send a photo of the log (Menu -> GSM status -> log).
If your UKU Wi-Fi controller does not connect to the network:
If your Wi-Fi controller still does not connect to the network, take a picture of the error log displayed after pressing “Connect”, and e-mail it to us at support@huum.eu.
Are you using the SIM card that arrived with the controller?
Contact us at support@huum.eu.
Are you using another SIM card?
If the previous steps did not provide a solution, the problem may be in the main module. In that case, contact us and send us photos of the wiring of the heater and the main module.