Warning To Service Technicians - Whirlpool GM8155XJQ Job Aid

To avoid possible exposure to microwave radiation or energy, visually check the oven for damage
to the door and door seal before operating any oven. Use a microwave survey meter to check the
amount of leakage before servicing. In the event the R.F. Ieakage exceeds 4 mw/cm
appropriate repair must be made before continuing to service the unit. Check interlock function by
operating the door latch. The oven cook cycle should cut off before the door can be opened.
The door and latching assembly contains the radio frequency energy within the oven. The door is
protected by three safety interlock switches. Do not attempt to defeat them.
UNDER NO CIRCUMSTANCES SHOULD YOU TRY TO OPERATE THE OVEN WITH THE
DOOR OPEN.
• Proper operation of microwave ovens requires that the magnetron be properly assembled to
the waveguide and cavity. Never operate the magnetron unless it is properly installed.
• Be sure the "RF" seal is not damaged and is assembled around the magnetron dome properly
when installing the magnetron.
• Routine service safety procedures should be exercised at all times.
• Untrained personnel should not attempt service without a thorough review of test procedures
and safety information contained in this Job Aid.
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 and
the primary door interlock switch and/or the secondary interlock switch contacts fail in a closed
position.
CAUTION: REPLACE BLOWN FUSE WITH 20 AMPERE CLASS H FUSE ONLY
Test the upper and lower door interlock switches, cook relay and interlock monitor switch (middle
switch) for proper operation as described in the component test procedures, before replacing the
blown oven fuse.
DO NOT ATTEMPT TO REPAIR STICKING CONTACTS OF ANY INTERLOCK SWITCH,
SAFETY SWITCH OR COOK (LATCH) RELAY. THE COMPONENTS MUST BE REPLACED.
Any indication of sticking contacts during component tests requires replacement of that component
to assure reliability of the safety interlock system.
IF THE FUSE IS BLOWN, THE MONITOR, PRIMARY, AND SECONDARY INTERLOCK
SWITCHES MUST BE REPLACED. BE SURE THEY ARE PROPERLY CONNECTED.

Warning To Service Technicians

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2 at 5 cm,