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

Safety first: Disconnect power before testing components.

• Verify temperature: Use an oven thermometer to compare actual temperature to the set temperature. Note any consistent offset.
• Inspect bake element: Look for dull spots, blisters, or cracks. Test for continuity and replace if suspect.
• Test sensor: Measure oven temperature sensor resistance (~1080–1100 Ω at room temperature). Replace if out of range.
• Check door gasket: Inspect for gaps, tears, or hardened sections. Replace if the gasket does not seal evenly.
• Calibrate oven: Many LG ovens allow temperature adjustment in settings (e.g., ±35°F). After hardware checks, adjust calibration to correct minor offsets.