Electric radiant cooktop zone does not heat at all.

Safety first: Disconnect power and allow the glass to cool completely before lifting the cooktop.

• Access element: Remove the cooktop from the counter and lift the glass surface to expose the radiant elements.
• Continuity test: Disconnect the suspect element and measure resistance across its terminals. An open circuit indicates a failed element.
• Inspect wiring: Check for burnt or loose connections at the element and control switch.
• Control test: On knob-controlled models, test the infinite switch for continuity between common and output terminals as the knob is turned. Replace if it does not switch.
• Replace parts: Install a new radiant heating element or infinite switch as required.

Tip: Handle the glass carefully to avoid cracks; never rest it on hard surfaces without padding.