Vokera smart thermostat shows E01 and will not control heating

Safety first: The thermostat is low-voltage but still isolate power to the heating system before removing it from the wall plate.

• Check mounting location: Ensure the thermostat is not installed directly above a radiator, near a fireplace, or in direct sunlight. Excess heat can damage the internal sensor.
• Power reset: Remove the thermostat from its wall plate (if it is a clip-on design) or turn off power at the fused spur for 30 seconds, then restore power and reattach.
• Inspect for moisture: Look for signs of condensation or water damage on the thermostat housing. If present, relocate the thermostat to a drier location and allow it to dry fully before reuse.
• Check temperature reading: Compare the thermostat's displayed room temperature with a reliable thermometer. If the reading is wildly inaccurate or E01 persists, the internal sensor is likely faulty.
• Replace thermostat: Internal sensor faults are not user-repairable. Replace the Vokera smart thermostat with an identical model or contact Vokera support.