OVEN TEMPERATURE SENSOR
OVEN TEMPERATURE
SENSOR
SENSOR
CONNECTOR
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.
Test Procedure
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) | Resistance (Ω) | |
|
|
|
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 | 1853 | ± 13.5 |
550 ± 8.2 | 2047 | ± 15.8 |
650 ± 8.6 | 2237 | ± 18.5 |
900 ± 13.6 | 2697 | ± 24.4 |
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|
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NOTE: If the readings vary more than 25˚F from the selected setting, the oven control should be calibrated, as described on page
