Thermostat shows E06 and room temperature reading is clearly wrong (e.g. -20°C or 60°C)

Safety first: The thermostat is low voltage, but do not expose internal electronics to moisture or static discharge.

• Check environment: Move any portable heaters or lamps away from the thermostat. Avoid mounting above radiators or in direct sunlight.
• Reboot and update: Remove and refit the thermostat or batteries. In the Wiser app, check for firmware updates and apply them.
• Compare with another thermometer: Place a reliable thermometer next to the thermostat and compare readings. If the thermostat is consistently far off and E06 appears, the sensor is likely faulty.
• Factory reset: Perform a factory reset via the app or thermostat menu. Reconfigure and observe if E06 returns.
• Replace thermostat: If the error persists, replace the Wiser Room Thermostat as the internal sensor is not user-repairable.