Troubleshooting - Thermador SMW272 B Service Manual

Lower Oven Section
• DISCONNECT THE POWER TO THE APPLIANCE BEFORE SERVICING.
• FOR THOSE CHECKS REQUIRING THE USE OF ELECTRICAL POWER, EXERCISE
EXTREME CARE.
• DO NOT PERFORM HIGH-VOLTAGE TESTS.
THE BLOWER MOTOR
Refer to Page 54 to access the blower motor.
1. With no power applied, disconnect the motor
wire connectors from their terminals.
2. Set the ohmmeter to the R x 1 scale.
3. Touch the ohmmeter leads to the motor
terminals. The meter should indicate 13 Ω.
4. If the reading is not correct, remove and
replace the blower motor.
BLOWER ASSEMBLY
Motor Terminals

TROUBLESHOOTING

TESTING THE COMPONENTS
WARNING
TO AVOID ELECTRICAL SHOCK
THE AIR SWITCH
Refer to Page 52 to access the air switch.
1. With no power applied, remove the wire
connectors from the terminals.
2. Set the ohmmeter to the R x 1 scale.
3. Connect one of the ohmmeter leads to the
common (C) terminal of the switch (the ter-
minal callouts are stamped on the switch).
4. Touch the free ohmmeter lead to the N.O.
(normally-open) switch terminal. The meter
should show no continuity with the switch in
its normal position, and continuity when it is
activated.
5. If the readings are not correct, remove and
replace the switch.
Air Switch
Page 61
SMW Oven Service Manual
COM
NC
NO
NO
COM
NC