LG Oven Element Will Not Heat? Causes & Fix

LG's three heating elements#

LG ranges typically carry three elements, and knowing them is half the diagnosis:

• a bottom bake element in the traditional spot on the cavity floor (concealed under a metal cover on some models), used for conventional baking;
• a rear ProBake element behind the back wall with the convection fan, the primary source in ProBake Convection mode;
• a top broil element, exposed at the ceiling, for broiling and roasting.

Which element failed?#

The mode that won't heat points to the element:

Causes at a glance#

Working through the causes#

Burned-out element (35%). Elements degrade over thousands of hours as the nichrome wire develops hot spots and eventually burns through. LG's rear ProBake element tends to outlast the bottom one because it is shielded from food drippings, but it still fails from thermal fatigue. A healthy element glows evenly red; no glow, or a visible break or blister, means it is done. Confirm with a continuity test and replace an open element.

Element terminal or wiring (25%). The high-current terminals where an element connects can corrode or loosen, adding resistance that weakens or kills the heat even when the element itself is intact. Inspect the terminals at the element and board for discoloration or melting, and replace damaged terminals with high-temperature-rated parts.

Convection fan disables the rear element (20%). On some LG models the rear ProBake element is disabled for safety if the convection fan is not running. So a range that heats fine in Bake but stays cold in ProBake Convection may have a failed fan, not a failed element. Test the fan first — if it runs but the rear stays cold, replace the rear element; if the fan is dead, that is the fault.

Control-board relay (10%). The board switches each element through a relay, and a failed relay means the element never gets its heat command even though it is good. An F9 code and a whole mode that will not heat despite good elements point here — diagnose the board once the elements, terminals, and fan check out.

Safety and diagnosis#

Cut power at the breaker before any inspection — the element circuit carries 240 volts, and these elements draw on the order of 2,000 to 3,500 watts. Use the mode-to-element map above to decide which element to test, then check it for an even glow and for continuity with the power off.

How to check an element the right way#

An element gives you two honest tests. The first is visual: with the oven cold and the suspect mode selected briefly, watch for an even, bright red glow along the whole element — a break, a blister, or a section that stays dark is a failure you can often see. The second is electrical, done with the power off at the breaker: disconnect the element leads and read continuity across its terminals. A good element shows a low, continuous resistance; an infinite or open reading confirms it is burned through. Do both, because an element can look intact yet be electrically open, and it can occasionally show continuity while a hidden hot spot keeps it from heating fully. Never test an element live in an energized oven — the circuit carries 240 volts and these elements draw thousands of watts, so every check happens with the breaker off.

Preventing a repeat#

• Keep the bottom-element area clear of food drippings, which create hot spots that shorten element life.
• Don't line the oven floor with foil on non-concealed-element models — it blocks airflow to the bottom element.
• Avoid slamming the door; the vibration stresses element terminal connections.
• If elements are noticeably slow to glow red, schedule a proactive replacement before they fail mid-bake.

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