Electrolux Overheating / Thermostat Out of Calibration

Water is too hot at taps; risk of scalding

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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

Thermostat set too high, Stuck thermostat contacts, Faulty NTC sensor reading low, Malfunctioning mixing valve

How to Fix / Troubleshooting

Safety first: Hot water can cause burns. Warn occupants and avoid using hot water until the issue is resolved.

Steps:

  • 1. Lower set temperature: Adjust the control panel or mechanical thermostat to a safe setting (around 49–55°C / 120–131°F).
  • 2. Test outlet temperature: Use a thermometer at the nearest tap to verify actual water temperature.
  • 3. Check thermostat or sensor: For mechanical thermostats, verify they cycle off at the correct temperature. For electronic models, test NTC resistance and replace if out of spec.
  • 4. Inspect mixing valve: Ensure the thermostatic mixing valve is functioning and not bypassed. Replace the cartridge or valve if it does not regulate temperature.

Professional help: Persistent overheating requires professional diagnosis to avoid safety hazards.

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Repair Difficulty

Medium 3/5

Required Part

Tank Thermostat
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