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To confirm timer motor condition, proceed as follows:
1. Carefully check motor wire leads and tighten loose connections.
WARNING: Use care while working with control panel. Terminals carry 120 volts.
2. Turn on power to the cooker.
3. Set timer dial (any setting beyond "0-Minute"). If operation is correct, the motor will turn the
dial toward "0-Minute." If the motor fails to operate, it is defective and the entire timer must be
replaced.
4. Shut off power to the cooker.
Door Interlock Switch
Malfunction of the cooker door interlock switch prevents timer indicator lights from turning on and
steam solenoid from opening when the timer dial is set. If steam does not enter the compartment and
the indicator light fails to turn on with the door latch securely engaged, the fault may be in the door
interlock switch. Proceed as follows:
1. Turn off power to the cooker.
2. Disconnect wires to the door switch terminals (see Figure 4 on page 22).
3. Connect an ohmmeter between the terminals of the switch.
4. Actuate the switch by closing the cooking compartment door. If a zero reading cannot be obtained,
the switch is defective and must be replaced.
5. Remove the ohmmeter and replace the leads on switch terminals (see Figure 4 on page 22).
Steam Solenoid Valves
When either inlet solenoid valve fails to operate, the fault may be a defective coil. A defective coil is
found using an AC volt-meter to check the voltage at the coil wire terminals, with the cooker
compartment operating in either CONSTANT STEAM or 60-MINUTE TIMER mode. If voltage of 120 volts
is present and the coil fails to open the valves, the fault is in the valve coil. Defective valve coils are not
separately replaceable, requiring complete valve replacement.
Indicator Lights
If the cooker compartment functions correctly, with the single exception that the indicator light fails to
light during operation, the fault is a defective indicator light. A "burned out" or defective light is verified
by using an AC volt-meter at the leads, with input power on the selector switch in the correct position
for that timer, the timer set, and the door latches closed. If 120 volts is present, the fault is in the
indicator light and requires replacement. If 120 volts is not present, the fault is in the wiring or control
components (selector switch, timer, or door switch).
Cooking Compartment Thermostatic Switch
A thermostatic switch included in the circuit for the timer motor delays timer operation until steam
flowing into the compartment satisfies the temperature-actuated switch device. If a timer motor fails to
operate within about one minute after the indicator light comes on (with cooker compartment empty),
the cause may be a defective thermostatic switch. To test the switch, proceed as follows:
1. Disconnect the two wires connected to the thermostatic switch terminals.
2. Connect an ohmmeter between the two terminals of the switch.
3. Place the cooker into operation and observe ohmmeter dial. Within one minute of operation,
the switch contacts close automatically to register a zero ohm reading on the dial. If a zero ohm
reading is not obtained, the switch is defective.
4. Shut off cooker, disconnect ohmmeter leads, and replace wires on switch terminals.
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