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since you can't tell if an oven sensor is malfunctioning simply by looking at it
you'll need to test it with a meter
oven censors come in many shapes and sizes
but all of them can be tested in the same way
you can choose from a variety of multimeters to perform the test
for this demonstration we will use both analog and digital models
when using an analog model
first rotate the range selection dial to the lowest setting for ohms of
resistance
then calibrate the meter by pinching the probes together
while adjusting the needle to read zero
when using a digital model
again rotate the dial to the lowest setting for ohms of resistance
or resistance with tone if your meter has this option
before you begin make sure the sensor your testing has been removed or
isolated from the appliance
use a probe to touch one of the sensor's terminals
and the second probe to touch the other terminal
if the sensor is functioning properly the meter should read between one
thousand and eleven hundred ohms of resistance at room temperature
be aware that the high resistance of the sensor will probably prevent a meter
tone
a significantly different reading strongly suggests that the sensor is
malfunctioning
and will need to be replaced