E07
Bosch Washing Machine
Severity: ModerateWhat Does This Error Mean?
The E07 error on a Bosch washing machine indicates a temperature sensor (NTC) fault. The NTC sensor monitors water temperature throughout the wash cycle. Without it, the machine can't heat water to the correct temperature.
Affected Models
- WAW285H2GB
- WAN28080GB
- WAT28400GB
- Most Bosch front-load washing machines
Common Causes
- The NTC temperature sensor has failed — burned out or broken connection
- The wiring connector to the NTC sensor has come loose
- Heavy limescale buildup has coated the sensor and disrupted its reading
- The NTC sensor is giving an out-of-range reading due to a cold water supply
- The main control board is not correctly interpreting the sensor signal
How to Fix It
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Turn the programme dial to Off and unplug the machine.
Wait 10 minutes for a full power reset before any further action.
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Plug back in and select a 40°C cotton cycle.
A reset sometimes clears a temporary NTC reading error.
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Run a descaling cycle using a washing machine descaler or citric acid.
Limescale on the NTC sensor causes inaccurate readings. Descaling can restore it.
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Check that the incoming water is not extremely cold.
In very cold weather, incoming water temperature can cause the NTC to report an out-of-range reading.
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If E07 persists, contact a Bosch technician to test and replace the NTC sensor.
The sensor is accessible from the rear of the machine and takes about 30 minutes to replace.
When to Call a Professional
NTC sensors are inexpensive — typically $15–$40. Accessing the sensor requires removing the rear panel of the machine. Full repair costs including labor: $80–$180. If the control board is at fault, costs rise to $200–$350.
Frequently Asked Questions
What does an NTC sensor do in a washing machine?
NTC stands for Negative Temperature Coefficient — it's a thermistor. It measures the water temperature inside the drum. The control board uses this reading to regulate the heating element and achieve the correct wash temperature.
Can limescale really cause an E07 error?
Yes. A thick layer of limescale on the NTC sensor acts as insulation. It slows the sensor's response and causes it to report inaccurate temperatures. Regular descaling every 2–3 months prevents this.
How much does an NTC sensor cost for a Bosch washer?
The part typically costs $15–$40. Combined with $80–$140 in labor, a full NTC replacement is $100–$180. It's one of the more affordable washer repairs.