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

Safety first: Turn off power before removing panels or testing components.

• Verify with thermometer: Place an oven-safe thermometer in the center of the oven and compare actual temperature to the set temperature over several cycles.
• Check door gasket: Inspect the door seal for gaps, tears, or hardened sections. Replace if not sealing evenly.
• Test sensor: Measure resistance of the oven temperature sensor at room temperature (~1080–1100 Ω). Replace if out of range.
• Inspect elements: Ensure both bake and broil elements glow evenly during preheat. A partially failed element can slow heating and cause uneven temperatures.
• Adjust calibration: Many Dacor controls allow temperature offset adjustment in the settings menu (e.g., ±35°F). Follow the user manual to fine-tune if the oven is consistently off by a small amount.

Warning: Large temperature errors usually indicate a component fault, not just calibration; do not rely solely on offset if the difference is more than about 35°F.