When a Bosch oven throws Error Code E115, it’s your oven’s way of saying, “I’m running too hot.” The control board is seeing an abnormally high temperature reading—often from the temperature sensor (NTC/thermistor), a stuck heating element, a misreading thermostat, poor ventilation, or even a cooling fan that isn’t doing its job. Whatever the trigger, treat it seriously: prolonged overheating can warp liners, cook electronics, and turn a simple fix into a major repair.

First move: switch the oven off and let it cool completely. Don’t try to “power through” a cycle or keep opening and closing the door to finish dinner; you’ll only push the fault further. Once the cavity is cool, you can try powering the unit back on to see if the code clears, but consider that a quick check—not a solution. A recurring E115 means the cause is still there.

Why E115 happens

In most cases, the control board is getting a message that temperature is out of bounds. That can happen if the sensor is out of calibration or failing, if a bake or broil element is sticking on after the relay opens, if door seals are leaking heat into the sensor path, or if airflow is compromised—think blocked vents or a cooling fan that’s sluggish, noisy, or seized. Less commonly, the control board itself is misinterpreting a normal reading because of a damaged trace or heat-stressed components.

How we fix it (and keep it from coming back)

At Appliance Repair Los Angeles, we start with brand-level diagnostics: reading live sensor values at room temp and under heat, checking resistance curves against spec, and verifying that relays open and close cleanly. We’ll inspect door gaskets for gaps, test the cooling fan’s speed and spin-down, and confirm that ventilation paths aren’t blocked by cabinetry or foil liners. If an element is overfiring, we’ll trace it back to a stuck relay or shorted element; if the sensor is drifting, we’ll replace it with an OEM part and recalibrate the oven so setpoint matches reality. When it’s a control-board issue, we’ll evaluate whether board repair or replacement is the smarter, longer-term fix.

Good habits to prevent E115

Give your oven room to breathe—don’t block vents, and avoid covering racks and liners with solid foil that traps heat. Keep door seals clean and intact so heat stays where it belongs. If you notice the cooling fan getting loud or the cavity feeling unusually hot at the control panel, that’s your early warning—get it checked before E115 shows up again.

Ready when you are

If your Bosch oven is showing E115 or running hotter than it should, we can help. Our LA technicians handle same-day diagnostics when routes allow, carry genuine Bosch parts, and leave your oven calibrated, safe, and consistent. Book a visit and we’ll get you back to reliable, even cooking—without the error codes.