T Smart Immersion Heater Thermostat - Potential Errors/Fixes

Errors

Please see below a list of potential list of warnings/errors and actions to fix. If you still need help, please call our technical department on 0121 686 8733.

W01 - FAULTY UPPER SENSOR
Upper temperature sensor is faulty	Switch the power supply off and then switch it back on. If the warning repeats, please call us to see if the thermostat needs replacing
W02 - FAULTY LOWER SENSOR
Lower temperature sensor is faulty	Switch the power supply off and then switch it back on. If the warning repeats, please call us to see if the thermostat needs replacing
W03 - UNDERHEATING
Open Tap	Check if all the taps using hot water are closed
Heater burnt out	Please call us
Faulty thermostat relay	if the problem persists after execution of above steps, the thermostat needs to be replaced
E01 - FAULTY SENSORS
Both temperature sensors are not working properly	Switch the power supply off and then switch it back on. If the warning repeats, please call us to see if the thermostat needs replacing
E02 - OVERHEATING
Faulty thermostat relay	Please call us to check the thermostat and replace it if needed
Limescale on heater	Accumulated limescale on heater may cause local overheating. Remove the element to clean off the limescale. In the worst cases the element may have to be replaced
E03 - DRY HEATING
The water tank is empty	Switch off the power supply. Fill in the tank with water (check if the water is running through the hot water tap). Switch the power supply back on.
Limescale on heater	if the tank is not empty and this error is showing, it may be the accumulated limescale on the heater. Remove the element to clean off the limescale. In the worst cases the element may have to be replaced
E04 - SERIAL COMMUNICATION ERROR
Device is not properly connected	Have the service check if the cable between the thermostat and display module is properly connected. If the error repeats, replace the thermostat
NO DISPLAY ALTHOUGH THE DEVICE IS CONNECTED TO THE POWER LINE
OFF button was pressed	Try turning the device on via display module or mobile application
The fuse popped out on the main switch board	Check the main switch board
Overheating safety mechanism has performed its function	Call the service to check the safety mechanism and reset it if necessary
Thermostat is faulty	Call the service to replace the thermostat