Samsung Oven Won't Turn Off: What to Check First

Cut power now#

If the oven ignores the off button and keeps climbing, do not wait — switch off its breaker to kill the circuit. On a gas model the burner should stop within moments once power is gone; on an electric model the element stops glowing. Leave it off until the fault is diagnosed rather than trusting the controls again.

Why it won't stop#

• A welded control relay. The board switches the element or gas valve through relays. When the contacts weld shut, the circuit stays live no matter what the display says — the most common cause here.
• A shorted temperature sensor. A sensor that shorts reads as though the cavity is cold, so the board keeps driving heat and can trip an over-temperature code such as E-27 while it does.
• A control board fault. Beyond a single relay, a failed board can lose control of the heating output entirely and needs replacing.
• A stuck gas safety valve. On gas models a valve that will not close keeps feeding the burner even after the igniter should have dropped out.

What you can and cannot do#

Cutting power and confirming the symptom is the safe DIY limit. Testing a welded relay or a shorted sensor means working inside a live oven — a 240-volt circuit on electric models — and diagnosing a stuck gas valve is not a homeowner job. Models like the NE59 route all of this through one board, so a technician confirms whether the relay, sensor, or board is at fault before swapping parts.

Before the holiday cooking season#

An oven that will not shut off is both dangerous and impossible to plan a holiday meal around. If yours has overshot or ignored the off button even once, stop using it and get it checked well before the cooking days arrive. Leave it on its breaker until then, and book a visit so a technician can test the relay, sensor, and valve.