Oven Holds Bake Temp But Broil Cuts Out Decision Tree

Why this matters

An electric oven that bakes correctly but loses the broil function partway through a broil call splits cleanly along the difference between the two circuits, which makes it one of the more diagnosable oven complaints. Bake and broil usually share the control board, the door, and the wiring trunk but use different heating elements, different relays on the control, and different temperature exposure. Broil runs the element at full power continuously near the oven's high-limit ceiling, so any weakness, a degrading element, a marginal relay, a high-limit thermostat with a low trip point, or a control that overheats, shows up under broil's harsh duty cycle while bake's gentler cycling masks it. The branches isolate which shared-but-stressed component fails only when broil's higher load and temperature are applied.

Symptom presentation

Customer reports baking works normally but the broil element glows then drops out after several minutes, food does not brown, or the oven shows a fault or simply stops heating on broil. Bake holds temperature fine. On some units a high-limit fault or a generic element code appears.

Reproduce by running a bake call to confirm normal temperature hold, then a broil call with a probe at the broil element. Watch and time how long the broil element stays energized before it drops, and whether it returns after a cooldown.

Quick checks at the door

Visually inspect the broil element for blistering, breaks, or a bright hot spot indicating a near-failure that opens when it thermally expands. A broil element that glows unevenly or has a visible blister is the prime suspect.

Check the oven cavity high-limit thermostat location and confirm the cavity is not running abnormally hot on broil (a blocked vent or a stuck bake element also firing can drive the cavity past the high-limit). Confirm both elements are not energizing together unexpectedly.

Isolation tree

Branch A (broil element opens hot): the element has a developing break that conducts cold but opens when expanded under full broil power. Measure element resistance cold (should read its rated ohms) and watch it open as it heats, or simply replace on visible blistering. This is the most common cause of a broil-only dropout.

Branch B (broil relay on control failing): the control board relay that switches the broil element can weld, arc, or fail to hold under broil's sustained high current while the bake relay, switching a cycling lower load, survives. Confirm the control commands broil voltage and that voltage is present at the element terminals while broil is supposed to be on. If the command is present but the relay does not pass voltage continuously, replace the control board.

Branch C (high-limit trips on broil): a cavity high-limit thermostat with a drifted low trip point opens during broil's high-temperature run but never reaches its point during gentler bake cycling, cutting all heat. Measure the high-limit trip behavior against spec; replace if it opens below the rated temperature. Confirm first that the cavity temperature is actually within normal broil range and the high-limit is not correctly protecting against a real overtemperature.

Branch D (overtemperature cause behind a correct high-limit trip): if the high-limit is tripping at its correct point, the cavity is genuinely overheating on broil. Find the cause: a stuck bake relay firing the bake element simultaneously, a blocked oven vent, or a failed cooling-fan path. Correct the overheat source rather than the high-limit.

Branch E (wiring / terminal at broil element): the broil element terminals run hot and the connectors and porcelain wire nuts there degrade with heat cycling. A loose or oxidized broil terminal increases resistance, overheats, and opens the circuit intermittently. Inspect the element terminals and the high-temperature wire leads; repair the connection with proper high-temperature terminals.

Confirming the diagnosis

After the repair, run a full broil call for the unit's normal preheat-and-broil duration with a probe at the element. The broil element must stay energized and glowing for the full call without dropping out, and the cavity high-limit must not trip during normal broil operation. Follow with a bake call to confirm bake was not disturbed. Re-run broil from a cold start and again from a hot start, since the open-when-hot failure mode of Branches A and E only appears under thermal expansion.

Remediation by branch

Branch A: broil heating element.

Branch B: oven control board (relay assembly).

Branch C: cavity high-limit thermostat (only when it trips below its rated temperature).

Branch D: stuck bake relay / control, vent clearing, cooling-fan path correction (the overheat source).

Branch E: high-temperature terminal connectors and element leads.

When to escalate

A broil dropout that survives a new element, a confirmed-good control, and a verified high-limit, with no overtemperature present, is unusual. Suspect a marginal connection in the oven's main power feed (one leg of the 240 V supply dropping under the higher broil load) that drops broil current while the lighter bake load still functions. Measure both legs of the supply under broil load at the terminal block.

References

• ANSI / UL 858 (Household Electric Ranges).
• DOE 10 CFR Part 430, Subpart B, Appendix I (kitchen ranges and ovens test procedure).
• NEC Article 422 (Appliances) for the range circuit and disconnect requirements.
• NFPA 70 (National Electrical Code) general provisions for the appliance branch circuit.
• OEM service manuals (Whirlpool, GE, Frigidaire) for element resistance, high-limit trip values, and control relay test procedures on the model tag.