Whirlpool SPEEDCOOK GH6208 XR Technical Education page 71

Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
FC THERMISTOR
Refer to page 4-22 for the procedure for ac-
cessing the FC thermistor.
1. Unplug microwave oven or disconnect
power.
2. Disconnect one of the wires from the FC
thermistor terminals.
3. Set the ohmmeter to the R x 100K scale.
4. Touch the ohmmeter test leads to the
FC thermistor connector pins. The meter
should indicate 230 KΩ ±20% @ 77°F
(25°C).
Electrical Shock Hazard
CAVITY THERMOSTAT &
HUMIDITY SENSOR
Refer to page 4-22 for the procedure for ac-
cessing the cavity thermostat and humidity
sensor.
1. Unplug microwave oven or disconnect
power.
2. Disconnect one of the wires from the
cavity thermostat terminals, or discon-
nect the wire connector for the humidity
sensor from the relay control board.
3. To test the cavity thermostat:
a) Set the ohmmeter to the R x 1 scale.
b) Touch the ohmmeter test leads to
the thermostat terminals. The meter
should indicate a closed (0 Ω) circuit.
4. To test the humidity sensor:
a) Set the ohmmeter to the R x 1K
scale.
b) Touch the ohmmeter test leads to sen-
sor connector pins 1 and 3, and then
2 and 3. The meter should indicate ap-
proximately 2.8 KΩ @ 77°F (25°C).
5-5
Humidity
Sensor
Cavity
Thermostat