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The D-shaft hub socket is cracked or stripped, causing the knob to spin freely or fall off the valve stem without engaging the gas valve.
A damaged or slipping knob prevents accurate flame adjustment from Hi to Lo, making precise temperature control impossible.
A failed knob cannot push the valve to the Ignite/Light position, so the spark igniter never activates and the burner won't light.
Heat and daily use cause the printed Hi/Lo/Off markings to fade or disappear, making it unsafe to operate the burner without a clear reference point.
💡 Pro Tip: Is Your Burner Knob the Problem?
Your part is likely the culprit if you notice any of the following:
⚠️ Markings (Hi / Lo / Ignite) on the knob face are worn off or illegible
⚠️ Knob base is cracked and the knob wobbles or won't stay seated on the shaft
⚠️ Knob spins freely without engaging the gas valve — burner won't light or adjust
⚠️ Knob is stiff, sticky, or impossible to turn to a specific heat setting
🔍 Diagnostic tip: Pull the knob straight off and inspect the D-shaped hub socket. If the D-slot is cracked, stripped, or the metal insert is missing, that confirms the knob needs replacement. Always verify your cooktop model number (located on the rating plate under the cooktop lid) before ordering.
📦 What's in the Box
✅ 1× WB03X25796 Surface Burner Control Knob — Stainless Steel (~2" dia × 2"L, 0.18" D-shaft), includes D-insert clip and plastic light-diffuser collar
We typically respond within 1 business day. Include your appliance model number for the fastest answer.
Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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