Maytag Built-in Refrigeration, Руководство пользователя

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The evaporator thermistor monitors the evaporator temperature and is used in the
compressor speed algorithm. A second duty of the evaporator thermistor is termination of
the defrost cycle. While there is a safety thermostat available in case of system failure,
the end of defrost is determined by the thermistor reading.
Servicer’s Note
All six thermistors can be checked from the control panel by using the service mode. The
initial tests will give you a GO-NO GO check of the thermistor. This will determine if the
component has either shorted or opened. The secondary check will display the
temperature that the system believes the thermistor to be.
If a thermistor is a few degrees off from your findings with a calibrated digital
thermometer, it is not usually a cause for concern. If a thermistor is considerably different
than the actual temperature the system will not provide the proper cooling capacity. This
could result in frozen items in the fresh food compartment or thawing of frozen goods.
If you see a temperature display of –99 for either the fresh food or freezer section it is an
indication of an open thermistor in that compartment. If you see a temperature reading of
99, it is an indication of a shorted thermistor.
Temperature
(Degrees F)
Resistance
0 85KOhm
10 62.5KOhm
20 46KOhm
30 34.5KOhm
40 26KOhm
Therm istor Resistance
0
50000
100000
150000
200000
250000
-50 0 50 100 150
Tem perature
R
esistance