Wiser Overheating Electronics / Potential Short

Thermostat emits a burning smell or feels unusually hot to the touch

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Safety Warning

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.

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Possible Causes

Internal component failure, Shorted PCB track, Incorrect wiring causing overload, Blocked ventilation slots

How to Fix / Troubleshooting

Safety first: Immediately switch off power to the heating system at the consumer unit. Do not continue using a device that smells of burning.

  • Allow to cool: Do not touch the thermostat or Heat Hub until it has cooled down.
  • Visual inspection (qualified persons only): Remove the device from the wall and inspect for scorch marks, melted plastic, or damaged wiring.
  • Do not reuse: Any device that has overheated should be replaced, not repaired, unless by an authorised service centre.
  • Check wiring: Before installing a new unit, have a qualified electrician verify that wiring is correct and that no overcurrent condition exists.
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Repair Difficulty

Professional Required 5/5

Required Part

Wiser Room Thermostat or Heat Hub (whichever is overheating)
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