Component Specifications
!
WARNI NG
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
©2002 Maytag Appliances Company 16021520 Rev. 0
11
Illustration Component Testing Results
Thermal cutout Disconnect all wires from TCO.
Measure resistance across terminals.
Cavity TCO
Magnetron TCO
Magnetron TCO
Opens at 243
°F (117°C)
Closed at 150
°F and open at 250°F
Closed at 180
°F and open at 280°F
Diode
Discharge Capacitor
Remove diode lead from capacitor and
connect ohmmeter.
Reverse leads for second test.
Infinite resistance should be
measured in one direction and 50K
Ω
or more in the opposite direction.
NOTE: Ohmmeter must contain a
battery of 6 volts minimum.
Capacitor
Discharge Capacitor
Remove wires from capacitor terminals
and connect ohmmeter, set on highest
resistance scale to terminals.
Also check between each terminal and
capacitor case.
Between Terminals: Meter should
momentarily deflect towards zero
then return to over 5 M
Ω.Ifno
deflection occurs, or if continuous
deflection occurs, replace capacitor.
Terminal to Case: Infinite resistance
Magnetron
Discharge Capacitor
Remove wires from magnetron and
connect ohmmeter to terminals. Also
check between each terminal and
ground.
Between Terminals: Less than 1
Ω
Each terminal to ground measures
Infinite resistance.
Note: This test is not conclusive. If
oven does not heat and all other
components test good replace the
magnetron and retest.
Blower motor Remove all wires from motor.
Measure resistance across coil
Approximately 14
Ω
RFS12*
2
1
5
4
6
Transformer
1
2
4
Primary
H.V.
Secondary
6
Filament
5
Discharge Capacitor
Remove all wires from terminals.
Measure resistance from:
1to2
Terminal5to6
Terminal 4 to Ground screw on
transformer stack
Less than <1
Ω
Less than <1 Ω
Approximately 78 Ω
RFS9B, RCS10*,
RFS10*
2
1
5
4
6
Transformer
1
2
4
Primary
H.V.
Secondary
6
Filament
5
Discharge Capacitor
Remove all wires from terminals.
Measure resistance from:
1to2
Terminal5to6
Terminal 4 to Ground screw on
transformer stack
Less than <1
Ω
Less than <1 Ω
Approximately 138 Ω
1
2
4
5
3
3
6 minute timer Remove leads from timer contact
terminals.
Measure resistance of following
terminals:
1to2
Timer in OFF position
1to2
Timer in ON position
4to5
Timer in OFF or ON position
If timer does not indicate readings
below, replace timer.
Infinite
Ω
Approximately <1 Ω
Approximately 5.8 kΩ (timer motor)
