OVEN DOOR LOCK SYSTEM
CURRENT FLOW
Voltage is supplied to the control transformer whenever the range is plugged in. Current flows from L1, through the transformer, to the neutral side of the line. When voltage is supplied to the EOCs Latch Solenoid Relay, current flows through the Latch Solenoid, to the neutral side of the line.
L1
BK
| OVEN CONTROL |
|
BK | BROIL RELAY | BAKE VALVE |
BAKE IGNITOR | ||
W |
LATCH RELAY | LATCH |
| |
(N.O.) |
| ||
SOLENOID | W | ||
BR |
P5
OVEN CONTROL
TRANSFORMER
BAKE RELAY
VV
SENSOR
DOOR
SWITCH
YGY
DOOR LATCH
SWITCH
BUGY
N
W
P4
* PULSE 1 SECOND
THE OVEN TEMPERATURE SENSOR
The oven temperature sensor is a “Resistance Temperature Detector” (RTD), and is composed of a stainless steel tube with a thin film of platinum 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 sensor. When the oven control senses a resistance of less than 550 ohms, and greater than 3000 ohms, the bake and broil functions will be turned off.
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 corresponding reading shown in the chart:
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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