How to Fix / Troubleshooting

Safety first: Turn off power before touching internal components.

Check elements visually: During preheat, observe whether all elements (bake, grill, convection) glow or warm as expected. A dark section may indicate a failing element.
Inspect door gasket: Look for gaps, tears, or flattened areas in the door seal. Replace if damaged.
Verify temperature: Use an oven thermometer to compare actual temperature with the set value. Note any consistent offset.
Test sensor: Measure the oven sensor resistance at room temperature and compare with specifications. Replace if out of range.
Calibrate (if supported): Adjust the temperature offset in the settings menu according to the user manual.

Oven heats but does not reach set temperature or takes very long to preheat

Possible Causes