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TROUBLESHOOTING
39
Troubleshooting:
F1: BLOWER (Blower Running Status Bad)
NO
YES
NO
YES
NO
YES
NO
To From Description Expected Resistance
Black Red Winding (A-B) 5.9-7.3 Ohms
Black White Winding (A-C) 5.9-7.3 Ohms
Red White Winding (B-C) 5.9-7.3 Ohms
Black, Red, or White Green Windings to Chassis Open
Figure 33: Motor Windings Resistance Table
Is the wiring
harness properly
connected?
Check the motor
controller, top and
bottom blower motors,
and I/O control board.
(See page 51 for
schematic.)
Replace the blower motor(s). Be
sure to check both the top and
bottom blower motors (pages A-9
through A-10).
Correct the wiring
or replace I/O control
board (page A-8)/motor
controller (page A-7)
if damaged.
Are Status Indicators “B”
and “T” backlit in
TEST
MODE
? (see page 15)
Remove obstruction or if neces-
sary, replace blower motor(s)
(pages A-9 through A-10).
Replace motor
controller. (page A-7)
Fault Code Troubleshooting
From TEST MODE, you can run oven diagnostics and check fault counts. To access TEST MODE or turn on
Diagnostic mode, see page 15.
Replace the I/O
board (page A-8).
NO
YES
YES
Do resistance measurements
between windings and chassis
agree with values on motor
windings resistance table?
(Figure 33, below)
Is output from I/O
board to harness 1-10
volts? (Verify at test
points).
Is each blower motor
spinning freely?