M
ODEL
400 R
ESTAURANT
R
ANGES
T
ROUBLESHOOTING
O
PERATOR
’
S
M
ANUAL
1182299
REV
3 (05/05) D
RAFT
P
AGE
43
OF
64
TROUBLESHOOTING
Hot
BLOWER RUNS
INTERMITTENTLY
Check that the vents at each end of
the motor are not obstructed.
Check that the motor is not against
a wall.
Go to the junction box on the back
of the range and remove the cover.
Place a DVM or ammeter on the
black wire #1.
Check for excessive heat sources
behind the range.
Check for hot air leaks around the
motor pocket.
Cold
Check all wiring for loose
connections or breaks.
REMOVE THE MAIN POWER
SOURCE. UNPLUG OR
DISCONNECT CIRCUIT
BREAKER.
CAUTION!
Be sure a DVM is
protected to 40 amps or greater.
Connect main power supply.
Turn on the oven Power Switch.
Observe that the amperage surges
and returns to the motor amperage
reading for high speed.
If the motor shuts off and there
is no excessive heat around the
blower motor it must be
replaced.
If the amperage surge remains at
greater than the rating replace the
motor.
Test oven.
Check that there are no air flow
obstructions around the range.
Check for excessive grease and
dust buildup on the motor.
Leave the blower turned on and
turn off the oven thermostat and
allow to cool.
If the blower starts up turn the oven
and allow to reheat to 500
°
F.
Blower
starts but
shuts off.
