SOI/DT 2002-05 eb
89
599 35 23-17
8.18 NTC temperature sensor
8.18.1 General characteristics
In certain models (i.e. those with hybrid or electronic timers), an NTC sensor is used to control the washing
temperature. In these sensors, the internal resistance decreases as the temperature increases. This
reduction in resistance is detected by the electronic control system which, when the desired temperature is
reached, disconnects the heating element. Two types of sensor are produced; their shapes are different, but
their characteristics are identical.
NTC sensors are used in electronic washer-dryers to control the temperature and to calculate the drying
time.
1. Plastic
casing
2. Metal
capsule
3. NTC
resistor
4. Terminals
1. NTC
resistor
2. Metal
capsule
3. Terminals
4. Plastic
casing
RESISTANCE (
Ω
)
TEMPERATURE
(ºC)
Rated value
Maximum value
Minimum value
20
60
80
6050
1250
640
6335
1278
620
5765
1222
660
8.18.2 Electrical symbol
8.18.3 Checking for efficiency
Use a tester to check that the resistance of the sensor corresponds to the temperature.