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Gas Sensor
The gas sensor detects humidity changes during
sensor cook functions and transmits this
information to the main board.
The gas sensor is located in the air exhaust duct,
behind the grille on the left side.
To check, run diagnostics (
see Diagnostics Test).
Removal
Remove the hidden vent (see
Microwave Removal
and Component Access). Slide white plastic
retainer forward and pull the gas sensor down.
Transformer
The transformer is located behind the fan
mounting plate below the magnetron.
Resistance through the transformer from the
power cord (L) to the high-power secondary
interlock (blue wire) is approximately 0.32 ohms.
The door (primary and monitor interlock) must be
closed.
Resistance through the transformer from the
high-power secondary interlock (blue wire) to the
low-power secondary interlock (single white wire)
is approximately 28.7 ohms. The door (monitor
interlock) must be closed.
Removal
WARNING: Prior to servicing the transformer, be
certain the capacitor is discharged. Manually
discharge by placing an insulated-handle
screwdriver between the diode connection of the
capacitor and the oven chassis ground.
Remove the microwave (see
Microwave Removal
and Component Access). Remove the screws and
the bottom panel. Disconnect electrical
connectors. Remove the white and red wires
from the capacitor and the red wires from the
magnetron.
Caution: The transformer is heavy.
Remove 4 screws from the bottom that hold the
transformer in place.
Magnetron
The magnetron is located behind the fan mounting
plate.
Removal
WARNING: Prior to servicing the magnetron, be
certain the capacitor is discharged. Manually
discharge by placing an insulated-handle
screwdriver between the diode connection of the
capacitor and the oven chassis ground.
Remove the microwave (see
Microwave Removal
and Component Access
). Remove the TCO and
the magnetron electrical connectors. Remove 4
nuts from the top of the magnetron and remove
the screw and brace. Remove the magnetron.
Gas Sensor