--- title: "Oven not heating" description: "Samsung oven not heating — before any part is considered, this make has a mode that produces exactly this and costs nothing: tESt on the display is demo…" url: "https://samsungmiami.support/symptoms/oven-not-heating/" date_modified: "2026-09-04" Appliance type: "Ranges, Wall ovens" --- # Samsung oven not heating ### Look at the display before the elements tESt or tE5t means demo mode: the oven and cooktop will not heat, and on gas models the cooktop still ignites. It is switched off through a model-specific procedure in the manual, and it is the first thing to eliminate on a range that responds perfectly and produces no heat. ### What it usually means, by the kind of Samsung appliance Samsung sells one appliance in several forms, and the same behavior points at different things on each of them. A built-in side-by-side and an integrated column are not the same service situation, and a dual-fuel range and an induction range fail in different halves. - **Electric** — Bake element, broil element, convection element and the relays that switch them. Which functions fail tells you which element. - **Gas** — The oven igniter draws current to open the valve, so a weak igniter gives an oven that will not light even though it glows. - **Dual fuel** — Gas on top, electric below. The cooktop working proves nothing about the oven. - **Flex Duo** — If only one cavity fails, check the partition and its switch before anything else. ### The mode that mimics a broken oven Demo mode exists so a range can be alive on a shop floor without heating. It is convincing: the panel works, the clock runs, timers count down and on gas models the burners light. Samsung shows it as tESt or tE5t. We have driven to houses where the whole visit was turning it off, and it is the first question we ask when somebody says an oven does everything except get hot. ### Why a glowing igniter can still be the problem On a gas oven the igniter does two jobs: it gets hot, and it draws current. The gas valve opens only when enough current flows through it. An igniter that has aged glows perfectly well and no longer draws enough — so it looks healthy, and the oven never lights. It is measured with a clamp meter, not by eye. Samsung's tESt. Free, and it produces this symptom exactly. The bake element or its relay An element that has failed usually shows a blister or a break. The oven igniter on gas It glows and still fails to draw enough current to open the valve — so it looks like it is working. The power connection Samsung's bAd LinE. Half a 240-volt supply gives a lit panel and a cold oven. The Flex Duo partition One cavity dead on a Flex Duo range is the partition before it is anything else. Read the display for tESt Demo mode. Free to clear and common enough to check first. Try bake, broil and convection separately Which ones fail tells you which element or relay. On gas, watch the igniter for two minutes It should glow bright orange and the burner should light. A dull glow with no flame is the classic weak igniter. On a Flex Duo, try both cavities One dead and one working points at the partition and its switch. The panel responds and nothing gets hot What it usually means Demo mode produces this exactly, and it is free to clear Bake, broil and convection are three separate elements On gas, the oven igniter is the usual answer and it is visible Look at the display before the elements tESt or tE5t means demo mode: the oven and cooktop will not heat, and on gas models the cooktop still ignites. It is switched off through a model-specific procedure in the manual, and it is the first thing to eliminate on a range that responds perfectly and produces no heat. What it usually means, by the kind of Samsung appliance Samsung sells one appliance in several forms, and the same behavior points at different things on each of them. A built-in side-by-side and an integrated column are not the same service situation, and a dual-fuel range and an induction range fail in different halves. Electric — Bake element, broil element, convection element and the relays that switch them. Which functions fail tells you which element. Gas — The oven igniter draws current to open the valve, so a weak igniter gives an oven that will not light even though it glows. Dual fuel — Gas on top, electric below. The cooktop working proves nothing about the oven. Flex Duo — If only one cavity fails, check the partition and its switch before anything else. The mode that mimics a broken oven Demo mode exists so a range can be alive on a shop floor without heating. It is convincing: the panel works, the clock runs, timers count down and on gas models the burners light. Samsung shows it as tESt or tE5t. We have driven to houses where the whole visit was turning it off, and it is the first question we ask when somebody says an oven does everything except get hot. Why a glowing igniter can still be the problem On a gas oven the igniter does two jobs: it gets hot, and it draws current. The gas valve opens only when enough current flows through it. An igniter that has aged glows perfectly well and no longer draws enough — so it looks healthy, and the oven never lights. It is measured with a clamp meter, not by eye. ### The cooktop works so the oven should too. Not on a dual fuel or a gas range: the top and the oven are separate systems with separate supplies of energy. A working cooktop tells you the appliance has power and nothing more. ### It heats but takes forever. That is a different complaint and usually a calibration or a sensor rather than an element — an element that is failing tends to fail rather than weaken. Worth measuring the actual temperature. --- **[Read full article: Oven not heating](https://samsungmiami.support/symptoms/oven-not-heating/)**