F40 error on electric range; one or more oven heating elements do not operate.

Safety first: Disconnect power at the breaker before touching any elements or wiring.

• Inspect elements: Look for visible breaks, blisters, or burn marks on the bake and broil elements.
• Test continuity: Remove at least one wire from the suspect element and measure resistance with a multimeter. An open circuit indicates a failed element that must be replaced.
• Check wiring: Inspect wires at the element terminals and at the rear of the oven for burns or loose spade connectors. Repair or replace as needed.
• Check terminal block: Ensure the main power connections at the rear terminal block are tight and not burnt.
• Replace EOC: If elements and wiring are good but the oven still does not heat and F40 persists, the EOC relay may be faulty and require replacement.