What's Happening
E115 is a serious overtemperature fault. It triggers when the oven's temperature sensor detects the cavity temperature has exceeded safe operating limits — typically well above 550°F (288°C) for normal cooking. This can be caused by a failed cooling fan that allows heat to build up in the control cavity, a stuck or shorted heating relay that locks the element on continuously, or a miscalibrated or failed temperature sensor falsely reporting extreme temperatures. E115 immediately shuts off all heating as a safety measure.
How to Fix It
Turn off the oven and allow it to cool completely — at least 30–60 minutes. Do not open the oven door while hot. Once cool, restore power and check if E115 clears on its own. If it does, the event may have been a transient sensor spike. If it returns during cooking, the cooling fan, oven relay, or temperature sensor needs inspection by a qualified appliance technician. Do not continue to use the oven while E115 is recurring — a stuck heating relay is a fire risk.
Frequently Asked Questions
What does E115 mean on a Bosch oven?
E115 means the oven has detected dangerously high cavity temperatures and has triggered its thermal protection cutoff. All heating stops immediately. This code should be taken seriously — do not restart the oven until the underlying cause is identified.
Is it safe to use my Bosch oven after an E115 code?
Let the oven cool fully first. A one-time E115 that clears after cooling may be a transient sensor event. If E115 returns during a subsequent cook cycle, stop using the oven and call a technician — a stuck heating relay in a runaway state is a genuine fire hazard.
What causes a Bosch oven to overheat and show E115?
The most common causes are a failed cooling fan (heat builds up in the control cavity), a relay welded in the closed position (element stays on), or a temperature sensor falsely reporting extreme values. A qualified technician with a service tool can identify which component has failed.
How much does it cost to repair a Bosch oven E115?
Cost varies significantly by root cause. A temperature sensor replacement is $20–$45 DIY. A failed relay or control board repair runs $200–$500 including labor. A cooling fan motor is $40–$80 in parts plus labor. Diagnosis before repair is essential for E115.