Bosch Dryer E05 — NTC Temperature Sensor Fault
Bosch Dryer · Error code E05
What E05 Means
The drum or air NTC (thermistor) is reading out of range — either open, shorted, or disconnected. Control disables heat as a safety measure.
Symptoms
- No heat during cycle
- Cycle ends early
- E05 appears within minutes of starting
- Erratic drying performance
Common Causes
Sensor has drifted out of specification — typically reads 50-100k ohms at room temp on a good sensor.
Connector at the sensor or main board has worked loose from vibration.
Chafed or pinched wire causes intermittent open.
Less common — board's ADC channel has failed.
How to Fix It
- Unplug the dryer.
- Remove the back panel to access the heater assembly and air ducting.
- Locate the NTC sensor (typically mounted on the heater housing or blower outlet).
- Inspect the wiring harness and reseat the connector firmly.
- Test the NTC with a multimeter for resistance at room temperature — replace if open, shorted, or wildly out of spec.
- Inspect wire harness for chafing along the entire run to the control board.
- If sensor and wiring test good, replace the main control board.
- Reassemble and run a heat cycle to verify temperature stays in normal range.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Bosch Dryer Codes
Verified against manufacturer documentation: bosch-home.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.