1:11
The accompanying chart can be
used to test the resistance of the
oven temperature sensor probe.
For accura
testing
use a high
quality thermometer or temperature
meter to determine actual oven
temperature before reading the
resistance of the probe.
Temperature Sensor Operation and Testing
RTD SCALE
Temperature (°F)
Resistance (ohms)
32 ± 1.9
1000 ± 4.0
75 ± 2.5
1091 ± 5.3
250 ± 4.4
1453 ± 8.9
350 ± 5.4
1654 ± 10.8
450 ± 6.9
1852 ± 13.5
550 ± 8.2
2047 ± 15.8
650 ± 9.6
2237 ± 18.5
900 ± 13.6
2697 ± 24.4
Probe circuit to case ground
Open circuit / Infinite Resistance
Relay and
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The oven temperature is monitored by the
lectronic
ven control
through the
emperature
ensor located inside the oven cavity. The
sensor
or RTD as it is sometimes called
increases its resistance as the
surrounding air temperature increases. The oven control interprets any
increase in the resistance of the sensor circuit as an increase in oven
temperature. If the wires or harness connections between the control
and the sensor are loose or otherwise defective
the resistance detected
by the control may be much higher than the actual sensor resistance. In
some cases
this can cause a false error message to be displayed on the
control such as F10 or F30.
Before assuming that a sensor is defective
test the sensor resistance
through the wire harness that attaches to the control. Disconnect the
wires from the control and test with an ohmmeter. Normal resistance
at room temperature is approximately 1091 ohms. If the resistance is
correct for the temperature listed in the chart below
then the sensor is
good and should not be replaced.
RELAY AND PLUG CONNECTION LOCATIONS ON
500 SERIES GAS RANGE CONTROLS
Bake
Broil
L1
N
Sensor
Motor Door Lock
Oven Light
Door Switch
Lock Motor Switch & Door Switch
Lock Motor Switch
Convection Fan Motor
RELAY AND PLUG CONNECTION LOCATIONS ON
300 SERIES GAS RANGE CONTROLS
Bake
Broil
L1
N
Sensor
Motor Door Lock
Oven Light
Door Switch
Lock Motor Switch & Door Switch
Lock Motor Switch