--- title: "Oven not heating" description: "Bosch oven not heating — an oven that never warms up, or one that heats but sits well below the temperature it was set to." url: "https://boschmiami.support/symptoms/oven-not-heating/" date_modified: "2026-08-18" Appliance type: "Ranges, Wall ovens" --- # Bosch oven not heating ### The fastest diagnosis is the code These ovens publish a code for the temperature sensor specifically, which is unusually precise. If you have one, photograph it before cutting power — several of these codes clear at the breaker and are then gone for good. ### Never hot, or never hot enough **No heat at all** points at an element, a relay, or on a gas oven the igniter. **Heat, but wrong** points at the sensor or at calibration. The second pair are far apart in price and only a measurement separates them, which is why a thermometer in the cavity is worth more than any description. ### What the codes add here These ovens are unusually specific: the temperature sensor has its own code, the touch panel has its own, and communication between the two boards has its own. Several clear with five minutes off at the breaker — and it is always worth trying, because a code that survives that is a code that means something. The temperature sensor Reads wrong and the oven heats to the wrong point. Has its own published code, and it is one of the cheaper repairs here. An oven cool by the same amount every time is often adjustable rather than broken. The cheapest outcome on this page and it is checked before anything is proposed. A heating element Bake or broil. Usually visible — a blister, a break, or a bright spot where it burned through. A gas igniter that has weakened On gas ovens they fail slowly: the oven lights later and later until it stops lighting. Predictable and a known part. A relay on the control board The board is what switches the elements. When a relay goes, the oven behaves as though the element has, and only measurement tells them apart. Put an oven thermometer in it At 350 and again at 450. An oven cool by the same amount at both is a calibration story; one that is fine at 450 and cool at 350 is not. Look at the elements while it preheats They should glow evenly. A blister, a break or a section that stays dark is your answer. Cut power for five minutes At the breaker. Photograph any code first, because it will be gone afterwards. Check the clock and any mode A timed bake that has ended, a sabbath mode, or a demo mode from the showroom floor will all leave an oven that refuses to heat. Never hot, or never hot enough What it usually means No heat at all Runs cool by a consistent amount Takes far longer to preheat than it used to The fastest diagnosis is the code These ovens publish a code for the temperature sensor specifically, which is unusually precise. If you have one, photograph it before cutting power — several of these codes clear at the breaker and are then gone for good. Never hot, or never hot enough No heat at all points at an element, a relay, or on a gas oven the igniter. Heat, but wrong points at the sensor or at calibration. The second pair are far apart in price and only a measurement separates them, which is why a thermometer in the cavity is worth more than any description. What the codes add here These ovens are unusually specific: the temperature sensor has its own code, the touch panel has its own, and communication between the two boards has its own. Several clear with five minutes off at the breaker — and it is always worth trying, because a code that survives that is a code that means something. --- **[Read full article: Oven not heating](https://boschmiami.support/symptoms/oven-not-heating/)**