Control Module – Heater Relays - Bosch SHI4302 Manual

VIII. Troubleshooting
VIII. Troubleshooting
Control Module
Control Module
HINT: Occasionally, a heater relay
terminal soldered to a # 266746,
263832 or 264461 control module pc
board can burn
solder
. If so, do not resolder the
relay, but replace the control
module.
The heater relay is the largest of three
relays in the center of the pc board & can
be one of two colors:
Black
For SHU 430x/53 models, reuse existing jumper (#
167782) for replacement module (SHU 53 shown).
Good board -- showing proper
soldering on back of pc board.
– Heater Relays
– Heater Relays
or have insufficient
Orange
81
HINT: Faulty
relays can
modules to count down
to "1" and stop.
NOTE: Replace all faulty
control modules
hold them for (60) days
for possible return for
analysis.
resolder control module
pc boards.
Burned board -- showing burned
terminal on back of pc board.
heater
cause
and
Do not