Oven Temperature Sensor - Whirlpool ESTATE TES325E W Service Manual

OVEN TEMPERATURE SENSOR

OVEN TEMPERATURE
SENSOR
Description
The operation of the Bake, Broil, and Self-
Clean cycles is controlled by the oven control
and the oven temperature sensor. The oven
temperature sensor is a "Resistance Tem-
perature Detector" (RTD), and is composed of
a stainless steel tube with a thin film of plati-
num at the end. It is located at the upper left
rear corner of the oven cavity. The RTD is a
nonadjustable assembly, but may be checked
at room temperature, or at 350˚F. A sensor
resistance of less than 550 ohms is regarded
as a shorted sensor, and a resistance greater
than 3000 ohms is regarded as an open sen-
sor. When the oven control senses a resis-
tance of less than 550 ohms, and greater than
3000 ohms, the bake and broil functions will
be turned off.
2-WIRE
SENSOR
CONNECTOR
4-5
Cooking Products Service Manual
Original July, 1996
© 1996 Whirlpool Corporation
WARNING
Electrical Shock Hazard
Disconnect from electrical supply before ser-
vicing unit.
Failure to do so could result in death or
electrical shock.
To test the oven temperature sensor, perform
the following steps:
1. Use an ohmmeter and set the range switch
to R x 10.
2. With no power applied, touch the leads of
the ohmmeter to the connector pins of the
sensor (you do not have to separate the
connectors). Depending upon the oven
temperature, you should obtain the corre-
sponding reading:
Temperature (˚F)
32 ± 1.9
75 ± 2.5
250 ± 4.4
350 ± 5.4
450 ± 6.9
550 ± 8.2
650 ± 8.6
900 ± 13.6
NOTE: If the readings vary more than 25˚F
from the selected setting, the oven control
should be calibrated, as described on page
4-13.
4321893
Page 4-5
Ω
Resistance ( )
1000 ± 4.0
1091 ± 5.3
1453 ± 8.9
1654 ± 10.8
1853 ± 13.5
2047 ± 15.8
2237 ± 18.5
2697 ± 24.4