Bosch BGH96 - 9 Flashes (Incorrect L1;L2 Polarity)

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Bosch 96% AFUE Gas Furnace Troubleshooting Guide
01.2019 | BTC 770502101 AData subject to change
3.6 9 Flashes (Incorrect Polarity of L1/L2)
Troubleshooting Chart
Start
Correct the wire
connection(black
and white wire)
according to
wiring diagram.
See Figure 23.
Figures
Figure 23
115V FIELD-
SUPPLIED
DISCONNECT
J-BOX
24V
TERMINAL
BLOCK
FURNACE
C
O
N
T
R
O
L
R
G
C
GND
BLOWER DOOR
SWITCH
WHT
BLK
WHT
BLK
W
GND
Y