Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to microwave oven and discharge the
high voltage capacitor before servicing, unless testing requires power.
16 16027303
© 2006 Maytag Services
Illustration Component Test Procedure Results
Ventilation Motor
JMV8166BA*, AMV6167BD*
Discharge Capacitor
Remove two wires to run capacitor and
measure resistance across the wires ...........
Approx. 75 . (Tests all 3 windings.)
Ventilation Motor
JMV9169BA*
Discharge Capacitor
Remove two wires to run capacitor and
measure resistance across the wires ...........
Approx. 25 . (Tests all 3 windings.)
Vent Blower Motor (run)
Capacitor
Discharge Capacitor
Remove one wire from capacitor terminals
and connect ohmmeter. Set on highest
resistance scale.
Between Terminals: Meter should
momentarily indicate several ohms,
then return to infinity (deflection). If
no deflection occurs, or if continuous
deflection occurs, replace capacitor.
Terminal to Case: Infinite resistance.
Cavity (Flame Sensor)
Thermal Cut-Out
(Thermostat)
Disconnect all wires from TCO.
Measure resistance across terminals..........
Non–resetable.
Open: ..... 212° F (100° C).
Cavity (Flame Sensor)
Thermal Cut-Out
(Thermostat)
Disconnect all wires from TCO.
Measure resistance across terminals...........
Resetable.
Open: ..... 302° F (150° C).
Closed: .. 140° F (60° C).
Cavity (Flame Sensor)
Thermal Cut-Out
(Thermostat)
Disconnect all wires from TCO.
Measure resistance across terminals..........
Non–resetable.
Open: ..... 248° F (120° C).
Magnetron Thermal Cut-Out
(Thermostat)
Disconnect all wires from TCO.
Measure resistance across terminals...........
Resetable.
Open: ..... 302° F (150° C).
Closed: .. 140° F (60° C).
Hood Thermal Cut-Out
(Thermostat)
Disconnect all wires from TCO.
Measure resistance across terminals...........
NOTE: This TCO only works in an
overheat condition. Otherwise, it will
measure "open" when testing.
Resetable.
Open: ..... 158° F (70° C). Vent fan
engaged.
Closed: .. 104° F (40° C). Vent fan
disengaged.
Bottom Thermal Cut-Out
(Thermostat)
Disconnect all wires from TCO.
Measure resistance across terminals...........
Non–resetable.
Open: ..... 248° F (120° C).
Sensor Remove the red and black wires, connect
meter to red and black wires and measure
continuity......................................................
NOTE: Do not connect the meter to the
white and orange wires, as this may
damage the sensor.
30 .
Control Panel Sensor Test
Illustration Component Test Procedure Results
Sensor Test Apply power to microwave for 5 minutes.
Press AUTO DEFROST and REHEAT
pads simultaneously and monitor display
for V-Out value............................................