Bosch Oven E118 (F118) Cannot Read Its Temperature Sensor

What E118 means

E118, which some models show as F118, turns up when the oven loses a clear reading from its temperature sensor. The cause might be the sensor itself, the wiring that carries its signal, or the control board's ability to interpret that signal. With no trustworthy temperature the oven has nothing to regulate against, so it may stop heating or run unevenly.

Common causes of E118

Temperature sensor that has failed
Sensor wiring damaged or disconnected
Control board unable to process the sensor signal

✓ One safe check you can try

1. There is no safe home test here. 2. The sensor circuit has to be measured with a multimeter on an oven that is fully de-energized. 3. What helps is writing down whether the oven heats at all, how long it ran before the code, and whether it shows E118 or F118. 4. Pass those details on when you book.

! Why to stop there

The sensor sits inside the cavity beside heating elements, and the wiring can carry live current.
Wiring, sensor and board give the same code, so replacing one at random often misses the cause.
Bending or moving the sensor probe during a check can throw off its readings for good.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Oven codes

E223Lower Probe Reads Colder Than Allowed (Bosch Oven E223) E226Bosch Oven E226 After the Lower Door Latch Signal Is Lost E309Control Module Failed Its Program Memory Check: Bosch Oven E309 E310Bosch Oven E310 Signals a Settings Memory Failure on the Control Module E312The Control Board's Own Heat Sensor Died (Bosch Oven E312) E314Bosch Oven E314 When the Cancel or Off Key Reads Stuck E414Off Key Failure Logged Behind the Scenes, Bosch Oven E414 E201Bosch Oven E201 on a Double Wall Model, Lower Cavity Sensor Reads Open

E118E118 questions

Are E118 and F118 the same thing?

Yes. Some Bosch models print the code with an E and others with an F, but the meaning is the same: the oven cannot read its temperature sensor properly.

Can I keep baking with this code?

We would not. An oven that cannot tell its own temperature may overheat or never reach the setting, and both can ruin food or create a hazard.

What will the technician do?

We test the sensor circuit with the oven de-energized, check the wiring and the board, and then give you a written price. Our repairs carry a 30-day workmanship warranty.