Thermostat randomly resets or reboots during operation

Safety first: Turn off power at the breaker before inspecting wiring.

Steps to address random resets:

• 1. Inspect and tighten terminals:
  • Remove the thermostat and check that L and N are firmly secured.
  • Retighten any loose screws.
• 2. Check supply stability:
  • If other devices on the same circuit flicker or reset, there may be a supply issue; consult an electrician.
• 3. Firmware update:
  • Update the thermostat firmware via the Fibaro controller to fix known stability issues.
• 4. Replace thermostat if hardware fault:
  • If resets continue despite stable power and updated firmware, the internal power supply or MCU may be defective; replace the unit.

When to call a professional: Persistent power quality issues should be investigated by an electrician.