Troubleshooting; Testing Components, 20A Time-Delay Fuse; Transformer Cooling Fan Motor - Thermador CM301B Service Manual

Lit. No. 94-30-006B

TROUBLESHOOTING

TO AVOID ELECTRICAL SHOCK DISCONNECT THE
20A TIME-DELAY FUSE
Touch Metal Caps
Refer to Page 12 to access the 20A time-delay
fuse. To test the 20A time-delay fuse, perform
the following steps.
1. Turn off the electrical power to the oven.
2. Set the ohmmeter to the R x 1 scale.
3. Touch the test leads to the metal end caps
of the fuse. If the fuse is good, the meter
should indicate a short circuit (0 Ω). If the
fuse is open, the meter will indicate an
open circuit (infinite resistance).
TESTING THE COMPONENTS
Resistance Measurements
WARNING
POWER TO THE APPLIANCE BEFORE TESTING.
20A Time
Delay Fuse
TRANSFORMER COOLING
FAN MOTOR
Refer to Page 15 to access the transformer
cooling fan. To test the motor, perform the
following steps.
1. Turn off the electrical power to the oven.
2. Disconnect one of the wires from the fan
motor.
3. Set the ohmmeter to the R x 1 scale.
4. Touch the test leads to the motor termi-
nals. The meter should indicate between
135 Ω and 150 Ω.
Page 49
CM Oven Service Manual
Fan
Terminals