Eurotronic Severe Electrical Failure / Overheating

Thermostat emits a burning smell or visible smoke.

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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

Short circuit in power supply, Overloaded relay contacts, Component failure on PCB, Incorrect wiring causing overcurrent

How to Fix / Troubleshooting

Safety: Immediately switch off power at the main breaker. Do not touch the thermostat until it has cooled. Risk of fire and electric shock.

  • Do not reuse: Do not attempt to power the thermostat again after a burning smell or smoke event.
  • Inspect wiring: After cooling, remove the thermostat and inspect the wiring in the wall box for signs of damage or overheating. Repair any damaged insulation or connectors.
  • Check load rating: Verify that the connected load does not exceed the thermostat’s rated current. Use an external contactor if needed.
  • Replace thermostat: Dispose of the damaged thermostat safely and install a new Eurotronic thermostat according to the wiring diagram.
  • Consult electrician: Have a qualified electrician inspect the circuit if there are any signs of wiring damage.
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Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB / Relay Section
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