Component Testing; Door Switches - KitchenAid KOMS155MBL Technical Education

Before testing a component, be sure to ob-
serve the following conditions:
• Discharge the high voltage capacitor before
conducting any of the following tests.
• All operational checks using microwave en-
ergy must be done with the microwave oven
loaded with a minimum of 275 ml (9.3 oz.) of
water in a microwave safe container.
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.

DOOR SWITCHES

Refer to page 4-4 for the procedure for servic-
ing the door switches.
1. Unplug microwave oven or disconnect
power.
2. Disconnect the wires from the switch ter-
minals.

COMPONENT TESTING

Electrical Shock Hazard
Normally-Open
Normally-Closed
• Conduct a microwave energy test after per-
forming any tests or repairs to the micro-
wave.
• Check that all wire leads are in the correct
position before operating the microwave
oven.
• Grasp wire connectors when removing the
wire leads from microwave parts.
WARNING
3. Set the ohmmeter to the R x 1 scale.
4. Touch the ohmmeter test leads to the
terminals of the primary or secondary
interlock switch (normally-open). The
meter should indicate an open circuit (in-
finite).
5. Touch the ohmmeter test leads to the
terminals of the monitor switch (normally-
closed). The meter should indicate a closed
circuit (0 Ω).
NOTE: Pressing the actuator button should
result in opposite readings (normally-open
should read closed, and normally-closed should
read open).
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