The oven heats but does not reach the set temperature or takes excessively long to preheat.

Safety first: Turn off the power before testing components.

• Check with an oven thermometer: Place a thermometer in the centre of the cavity and compare the actual temperature to the setpoint. Large discrepancies indicate a control or sensor issue.
• Inspect door seal: Look for gaps, tears, or flattened sections in the gasket. Replace if it is not sealing evenly all around.
• Element inspection: Look for hot spots or an uneven glow on elements (visible through vents or during grill use). Replace any element that glows unevenly or shows cracks.
• Sensor test: Measure the NTC sensor resistance and replace if it is out of spec.

Warning: Poor sealing can overheat the control panel and surrounding cabinetry. Do not ignore a damaged gasket.