Heatit Intermittent Power or Internal Fault

Thermostat randomly resets or reboots during operation

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Loose supply connection, Voltage dips from other loads, Internal power supply instability, Firmware crash

Safety first: Turn OFF power at the breaker before tightening terminals.

Steps to troubleshoot:

1. Tighten supply terminals:
- Check L and N connections for looseness and retighten.
2. Check circuit stability:
- Avoid sharing the thermostat circuit with large motors or welders.
3. Firmware update:
- Update thermostat firmware via your gateway if available.
4. Replace thermostat if issue persists:
- Persistent random resets indicate internal PSU or MCU issues; replace the thermostat.

Medium 3/5

Heatit Smart Thermostat (internal power/MCU)

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