Meross Severe Overheating / Component Burnout

Thermostat emits a burning smell or visible smoke during operation.

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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

Severely overloaded relay or terminals, Short circuit inside thermostat, Internal component failure due to surge

How to Fix / Troubleshooting

Immediate safety warning: Turn off power at the main breaker immediately. Do not touch the thermostat until it has cooled. If smoke or fire is present, evacuate and call emergency services.

Steps after safe:

  • Do not reuse: Do not attempt to power the thermostat back on. The unit is unsafe.
  • Inspect wiring: After cooling and with power off, remove the thermostat and inspect the wall box and wiring for heat damage. Replace any damaged conductors.
  • Check load sizing: Confirm that the connected heating load does not exceed the thermostat's rating. Plan to use an external contactor if needed.

Resolution: Replace the thermostat with a new Meross unit, ensuring correct wiring and load sizing. Consider having a qualified electrician inspect the circuit.

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Repair Difficulty

Professional Required 5/5

Required Part

Complete Thermostat Assembly
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