Bosch 800 series Service Manual page 34

58300000202443_ARA_EN_C
Error Code Description
Touch control module (TCM)
E044
option code error
Rotary encoder switch short to
E050
Vcc (500 series only)
E101 Cavity 1 / Cavity 2 temperature
E201 sensor open
E104 Cavity 1 / Cavity 2 temperature
E204
sensor shorted
E106 Cavity 1 / Cavity 2 door latch does
E206
not lock
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JANUARY 2018
Cause/Notes
TCM board or connections to TCM are bad.
During start-up, the control module is unable
to set TCM option code. Reset is required to
clear error.
A short to Vcc is detected in an encoder switch
for more than 10 seconds.
Temperature sensor disconnected or has a
faulty connection. Cooling fan will operate at
high speed and heating will stop. After two
consecutive temperature readings are made
successfully, heating will resume and error will
be cleared. See Communication Schematic.
Temperature sensor shorted to ground.
Cooling fan will operate at high speed and
heating will stop. After two consecutive
temperature readings are made successfully,
heating will resume and error will be cleared.
See Communication Schematic
Latch operation not determined by control
module. Door latch does not lock after 1
minute and further attempts will stop. Error
will be cancelled and normal operation
resumed if a locked door is no longer required.
See Cavity 1 (upper) Small Load Schematic
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Service Manual for Bosch 800 Series Built-in Wall Ovens
Suggested Action(s)
Enter Service mode to set correct option

code.
Check connection to control module.

Check connection to TCM.

If unable to set option code and

connections are good, replace front panel
assembly.
Replace rotary encoder switch
Check all connections and wires to

temperature sensor.
Check resistance of temperature sensor: if

sensor tests OK, could be control module
problem; if sensor fails, replace sensor.
Check wires and connections for pinch or

short circuit to ground.
Check resistance of temperature sensor: if

sensor tests OK, could be control module
problem; if sensor fails, replace sensor.
Check latch motor and switch

connections/wires.
Check connections to control board.

Check wires between control board and

latch. Check operation of door switch.
Check latch for binding/mechanical latch

failure.
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800 944-2904