Heatmiser Intermittent Power / Firmware Instability

Thermostat randomly resets or reboots during normal 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 power connections, Voltage dips from shared circuit, Firmware bug, Internal power regulator fault

Safety first: Isolate power before tightening any terminals.

Steps:

Check and tighten Live and Neutral terminals at the thermostat and wiring centre.
Ensure the thermostat is not powered from a circuit with large inductive loads (e.g., motors) that cause voltage dips.
Update the thermostat firmware via the Heatmiser app or NeoHub.
If resets continue after wiring and firmware checks, replace the thermostat as the internal regulator or processor may be faulty.

Medium 3/5

Heatmiser Smart Thermostat

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