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vii
© 1997 Whirlpool Corporation
Cooking Products Service Manual
Original March, 1997 4322167
Page vii
CAUTION: BEFORE TOUCHING
ANY OVEN COMPONENTS OR
WIRING, ALWAYS UNPLUG THE
OVEN FROM ITS POWER
SOURCE AND DISCHARGE THE
CAPACITOR BY USING A
20,000-OHM DISCHARGE RESIS-
TOR.
OR
USE AN INSULATED PLASTIC-
HANDLE SCREWDRIVER AND
SHORT ACROSS THE CAPACI-
TOR TERMINALS.
CAUTION
CAUTION: REPLACE BLOWN
FUSE WITH 15 AMPERE CLASS H
FUSE ONLY.
Before replacing the blown oven fuse, test the
upper and lower door interlock switches, cook
relay or latch relay, and interlock monitor switch
(middle switch) for proper operation as de-
scribed in the component test procedures.
DO NOT ATTEMPT TO REPAIR STICKING
CONTACTS OF ANY INTERLOCK SWITCH,
SAFETY SWITCH, OR COOK (LATCH) RE-
LAY (REPLACE SWITCHES).
Any indication of sticking contacts during com-
ponent test requires replacement of that com-
ponent to assure reliability of the safety inter-
lock system.
IF THE FUSE IS BLOWN, THE MONITOR,
PRIMARY INTERLOCK AND SECONDARY
INTERLOCK SWITCHES MUST ALSO BE
REPLACED. BE SURE THEY ARE PROP-
ERLY CONNECTED.
NOTES:
• For proper repair and assembly of the oven
door, refer to pages 2-4 and 2-5.
• Interlock switches are not adjustable indi-
vidually.
• For proper repair and adjustment of the
interlock switches, refer to page 2-8.
WARNING
DISCONNECT FROM POWER SUPPLY
BEFORE SERVICING.
CAUTION: HIGH VOLTAGES ARE
PRESENT DURING THE COOK
CYCLE. EXTREME CAUTION
SHOULD BE OBSERVED AT ALL
TIMES.
CAUTION: DO NOT TOUCH
OVEN COMPONENTS OR WIR-
ING DURING OVEN OPERATION.
ATTACH METER LEADS WITH
ALLIGATOR CLIPS WHEN MAK-
ING OPERATIONAL TESTS.
CAUTION: IT IS NEITHER NEC-
ESSARY NOR ADVISABLE TO
ATTEMPT MEASUREMENT OF
HIGH VOLTAGES.
Whirlpool microwave ovens have a monitoring
system designed to assure proper operation
of the safety interlock systems.
The interlock monitor switch will immediately
cause the oven fuse to blow if the door is
opened while the following combined failure
exists:
Primary door interlock switch and/or second-
ary interlock switch contacts failed in a closed
position.