SMEG Reduced Heating Capacity

Oven takes a very long time to preheat or never reaches set temperature

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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

Partially failed element (hairline crack), One element not operating (e.g., grill or lower), Incorrect supply voltage (single phase instead of two/three), Faulty thermostat or sensor

How to Fix / Troubleshooting

Safety first: Turn off power before testing elements.

Steps:

  • Check elements: Visually inspect all elements (bake, grill, fan) during preheat. All should glow or heat. Replace any that remain cold.
  • Continuity test: Test each element with a multimeter for correct resistance.
  • Verify supply: Confirm that the range is wired according to the SMEG installation diagram and that all required phases are present.
  • Sensor/thermostat: If elements are good and supply is correct, test and replace the oven sensor or thermostat as needed.

Warning: Incorrect wiring can damage the appliance; have an electrician verify connections if in doubt.

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Repair Difficulty

Medium 3/5

Required Part

Lower Bake Element
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