Oven takes excessively long to preheat or never reaches the set temperature on a Magic Chef unit.

Safety first: Turn off power before inspecting wiring or elements.

• Check both elements: During preheat, both bake and broil elements may cycle. If one never glows, test it for continuity and replace if open.
• Verify power supply: Have a qualified person measure voltage at the terminal block. You should see ~240V across the two hot legs. If only 120V is present, an electrical issue exists outside the oven.
• Inspect door gasket: Replace a damaged gasket that allows heat to escape.
• Control board: If elements and power are good, the EOC may not be energizing both elements properly. Replace the electronic oven control if confirmed.

When to call a technician: For live voltage checks and control diagnostics, professional service is recommended.