Oven heats but does not reach the set temperature; food takes much longer to cook than expected.

Safety first: Disconnect power before internal testing.

• Check door seal: Inspect the rubber gasket around the door for gaps, tears, or compression. Replace if it does not seal evenly.
• Test elements: Visually check that all elements glow (where visible) when heating. Measure resistance and compare with specifications; replace any element with significantly higher resistance or visible damage.
• Verify temperature: Use an oven thermometer to compare actual temperature with the set value. If the difference is large, test the NTC sensor and replace if out of range.
• Control calibration: Some Candy models allow temperature calibration via the control menu; refer to the user manual. If not, and all hardware is good, the control board may need replacement.