Control knobs on a Zline gas range oven are loose, wobbly, or do not turn the valve smoothly.

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

• Step 1 – Remove knob: Pull the knob straight off the valve stem. Inspect the inside hub for cracks or rounding.
• Step 2 – Inspect valve stem: Check the metal stem for rounding or damage. If the stem is damaged, the gas valve may need replacement by a professional.
• Step 3 – Install correct knob: Replace cracked or worn knobs with genuine Zline knobs designed for your model. Push firmly until fully seated.
• Step 4 – Test operation: Turn the knob through all positions to ensure smooth operation and proper alignment with markings.

Warning: Do not force a knob that is binding; this can damage the gas valve and cause leaks.