Testing Procedures
16026268 12 ©2005 Maytag Services
WARNING
!
Disconnect power before performing the following
procedures unless testing requires power.
NOTES:
• Perform microwave energy leakage test if unit is
serviced for any reason.
• Verify wire leads are connected to correct positions.
• When removing wire terminal plugs from connectors,
grasp the connector, not the wires.
Primary Interlock Switch Test
When the door is opened slowly, an audible click should
be heard. If the latch does not activate the switch when
the door is closed, the switch should be adjusted in
accordance with the adjustment procedure.
1. Disconnect power to oven and remove outer case,
(see “Outer Case” section in Disassembly
Procedure).
2. Remove control panel, (see “Control Panel” section
in Disassembly Procedure).
3. Discharge high voltage capacitor, (see "High Voltage
Capacitor" section in Disassembly Procedure).
4. Disconnect wire leads from switch.
5. Perform a continuity test by connecting one meter
lead on COM terminal and the other meter lead on
NO terminal.
Readings should be as follows:
Door closed .................0 ohms
Door opened ...............Infinite ohms
NOTE: When replacing component use identical
replacement part.
NOTE: After repairing the door or the interlock system,
it is necessary to do a continuity test before
operating the oven.
Secondary Interlock Switch Test
When the door is opened slowly, an audible click should
be heard. If the latch does not activate the switch when
the door is closed, the switch should be adjusted in
accordance with the adjustment procedure.
1. Disconnect power to oven and remove outer case,
(see “Outer Case” section in Disassembly
Procedure).
2. Remove control panel, (see “Control Panel” section
in Disassembly Procedure).
3. Discharge high voltage capacitor, (see "High Voltage
Capacitor" section in Disassembly Procedure).
4. Disconnect wire leads from switch.
5. Perform a continuity test by connecting one meter
lead on COM terminal and the other meter lead on
NO terminal.
Readings should be as follows:
Door closed .................0 ohms
Door opened ...............Infinite ohms
NOTE: When replacing component use identical
replacement part.
NOTE: After repairing the door or the interlock system,
it is necessary to do a continuity test before
operating the oven.
Interlock Monitor Switch Test
When the door is opened slowly, an audible click should
be heard. If the latch does not activate the switch when
the door is closed, the switch should be adjusted in
accordance with the adjustment procedure.
1. Disconnect power to oven and remove outer case,
(see “Outer Case” section in Disassembly
Procedure).
2. Remove control panel, (see “Control Panel” section
in Disassembly Procedure).
3. Discharge high voltage capacitor, (see "High Voltage
Capacitor" section in Disassembly Procedure).
4. Disconnect wire leads from switch.
5. Perform a continuity test by connecting one meter
lead on COM terminal and the other meter lead on
NC terminal.
Readings should be as follows:
Door closed .................Infinite ohms
Door opened ...............0 ohms
NOTE: When replacing component use identical
replacement part.
NOTE: After repairing the door or the interlock system,
it is necessary to do a continuity test before
operating the oven.
Magnetron
1. Disconnect power to oven and remove outer case,
(see “Outer Case” section in Disassembly
Procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" section in Disassembly Procedure).
3. Disconnect wire leads to magnetron.
4. Measure the resistance across filament terminals of
the magnetron.
Reading should be less than 1 ohm.
5. Measure the resistance from each filament terminal
to ground. Reading should indicate infinite ohms.
NOTE: Any other readings then what should be
indicated, magnetron needs to be replaced.
NOTE: Replace the magnetron if magnetron indications
are OK and all other high voltage components
test good (but the unit does not sufficiently heat).
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