Control knobs on a Magic Chef gas or electric range oven are loose, cracked, or do not turn the oven on reliably.

Safety first: For gas models, ensure all burners and oven are off before working near controls.

• Inspect knobs: Pull the knobs straight off and check for cracks or stripped splines inside.
• Check shaft condition: Inspect the metal shaft of the oven thermostat or selector switch for rounding or damage.
• Replace knobs: Install new Magic Chef-compatible control knobs that match your model.
• Verify operation: After replacement, test that the oven turns on and off smoothly and that temperature markings align reasonably.

When to call a technician: If the valve or switch shaft itself is damaged, internal control replacement is needed.