INSTALLATION AND OPERATION MANUAL AND PARTS LIST,
MODELS: STHE-7-TGG, STHE-12-TGG, STHE-16-TGG
PART NUMBER 10225R0
30
2010-09-07
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 cooking 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.
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.
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.
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 zero ohm reading is not obtained, the switch is defective.
4. Shut off cooker, disconnect ohmmeter leads, and replace wires on switch terminals.
