The oven heats but takes a very long time to reach the set temperature, or never reaches it.

Safety: Isolate the power supply before testing elements or seals.

• Check which elements heat: In fan mode, observe if the rear element glows (if visible). In conventional mode, check for both top and bottom heat. A non-glowing element may have failed.
• Test elements: Use a multimeter to measure the resistance of each element individually from the rear of the cooker. Replace any open or significantly high-resistance elements.
• Inspect door seal: Check the rubber gasket around the door for gaps, tears, or compression. Replace it if damaged or not sealing properly.
• Verify temperature: Use an oven thermometer to confirm the actual temperature. If elements and seal are good but the temperature is low, suspect the thermostat or sensor and replace them as needed.